chore(oidc): remove legacy storage methods (#10061)

# Which Problems Are Solved

Stabilize the optimized introspection code and cleanup unused code.

# How the Problems Are Solved

- `oidc_legacy_introspection` feature flag is removed and reserved.
- `OPStorage` which are no longer needed have their bodies removed.
- The method definitions need to remain in place so the interface
remains implemented.
  - A panic is thrown in case any such method is still called

# Additional Changes

- A number of `OPStorage` methods related to token creation were already
unused. These are also cleaned up.

# Additional Context

- Closes #10027 
- #7822

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/grpc/feature/v2beta/converter.go

@@ -12,7 +12,6 @@ func systemFeaturesToCommand(req *feature_pb.SetSystemFeaturesRequest) *command.
 	return &command.SystemFeatures{
 		LoginDefaultOrg:                 req.LoginDefaultOrg,
 		TriggerIntrospectionProjections: req.OidcTriggerIntrospectionProjections,
-		LegacyIntrospection:             req.OidcLegacyIntrospection,
 		UserSchema:                      req.UserSchema,
 		TokenExchange:                   req.OidcTokenExchange,
 		ImprovedPerformance:             improvedPerformanceListToDomain(req.ImprovedPerformance),
@@ -25,7 +24,6 @@ func systemFeaturesToPb(f *query.SystemFeatures) *feature_pb.GetSystemFeaturesRe
 		Details:                             object.DomainToDetailsPb(f.Details),
 		LoginDefaultOrg:                     featureSourceToFlagPb(&f.LoginDefaultOrg),
 		OidcTriggerIntrospectionProjections: featureSourceToFlagPb(&f.TriggerIntrospectionProjections),
-		OidcLegacyIntrospection:             featureSourceToFlagPb(&f.LegacyIntrospection),
 		UserSchema:                          featureSourceToFlagPb(&f.UserSchema),
 		OidcTokenExchange:                   featureSourceToFlagPb(&f.TokenExchange),
 		ImprovedPerformance:                 featureSourceToImprovedPerformanceFlagPb(&f.ImprovedPerformance),
@@ -37,7 +35,6 @@ func instanceFeaturesToCommand(req *feature_pb.SetInstanceFeaturesRequest) *comm
 	return &command.InstanceFeatures{
 		LoginDefaultOrg:                 req.LoginDefaultOrg,
 		TriggerIntrospectionProjections: req.OidcTriggerIntrospectionProjections,
-		LegacyIntrospection:             req.OidcLegacyIntrospection,
 		UserSchema:                      req.UserSchema,
 		TokenExchange:                   req.OidcTokenExchange,
 		ImprovedPerformance:             improvedPerformanceListToDomain(req.ImprovedPerformance),
@@ -52,7 +49,6 @@ func instanceFeaturesToPb(f *query.InstanceFeatures) *feature_pb.GetInstanceFeat
 		Details:                             object.DomainToDetailsPb(f.Details),
 		LoginDefaultOrg:                     featureSourceToFlagPb(&f.LoginDefaultOrg),
 		OidcTriggerIntrospectionProjections: featureSourceToFlagPb(&f.TriggerIntrospectionProjections),
-		OidcLegacyIntrospection:             featureSourceToFlagPb(&f.LegacyIntrospection),
 		UserSchema:                          featureSourceToFlagPb(&f.UserSchema),
 		OidcTokenExchange:                   featureSourceToFlagPb(&f.TokenExchange),
 		ImprovedPerformance:                 featureSourceToImprovedPerformanceFlagPb(&f.ImprovedPerformance),

internal/api/grpc/feature/v2beta/converter_test.go

@@ -20,7 +20,6 @@ func Test_systemFeaturesToCommand(t *testing.T) {
 	arg := &feature_pb.SetSystemFeaturesRequest{
 		LoginDefaultOrg:                     gu.Ptr(true),
 		OidcTriggerIntrospectionProjections: gu.Ptr(false),
-		OidcLegacyIntrospection:             nil,
 		UserSchema:                          gu.Ptr(true),
 		OidcTokenExchange:                   gu.Ptr(true),
 		ImprovedPerformance:                 nil,
@@ -29,7 +28,6 @@ func Test_systemFeaturesToCommand(t *testing.T) {
 	want := &command.SystemFeatures{
 		LoginDefaultOrg:                 gu.Ptr(true),
 		TriggerIntrospectionProjections: gu.Ptr(false),
-		LegacyIntrospection:             nil,
 		UserSchema:                      gu.Ptr(true),
 		TokenExchange:                   gu.Ptr(true),
 		ImprovedPerformance:             nil,
@@ -54,10 +52,6 @@ func Test_systemFeaturesToPb(t *testing.T) {
 			Level: feature.LevelUnspecified,
 			Value: false,
 		},
-		LegacyIntrospection: query.FeatureSource[bool]{
-			Level: feature.LevelSystem,
-			Value: true,
-		},
 		UserSchema: query.FeatureSource[bool]{
 			Level: feature.LevelSystem,
 			Value: true,
@@ -89,10 +83,6 @@ func Test_systemFeaturesToPb(t *testing.T) {
 			Enabled: false,
 			Source:  feature_pb.Source_SOURCE_UNSPECIFIED,
 		},
-		OidcLegacyIntrospection: &feature_pb.FeatureFlag{
-			Enabled: true,
-			Source:  feature_pb.Source_SOURCE_SYSTEM,
-		},
 		UserSchema: &feature_pb.FeatureFlag{
 			Enabled: true,
 			Source:  feature_pb.Source_SOURCE_SYSTEM,
@@ -118,7 +108,6 @@ func Test_instanceFeaturesToCommand(t *testing.T) {
 	arg := &feature_pb.SetInstanceFeaturesRequest{
 		LoginDefaultOrg:                     gu.Ptr(true),
 		OidcTriggerIntrospectionProjections: gu.Ptr(false),
-		OidcLegacyIntrospection:             nil,
 		UserSchema:                          gu.Ptr(true),
 		OidcTokenExchange:                   gu.Ptr(true),
 		ImprovedPerformance:                 nil,
@@ -128,7 +117,6 @@ func Test_instanceFeaturesToCommand(t *testing.T) {
 	want := &command.InstanceFeatures{
 		LoginDefaultOrg:                 gu.Ptr(true),
 		TriggerIntrospectionProjections: gu.Ptr(false),
-		LegacyIntrospection:             nil,
 		UserSchema:                      gu.Ptr(true),
 		TokenExchange:                   gu.Ptr(true),
 		ImprovedPerformance:             nil,
@@ -154,10 +142,6 @@ func Test_instanceFeaturesToPb(t *testing.T) {
 			Level: feature.LevelUnspecified,
 			Value: false,
 		},
-		LegacyIntrospection: query.FeatureSource[bool]{
-			Level: feature.LevelInstance,
-			Value: true,
-		},
 		UserSchema: query.FeatureSource[bool]{
 			Level: feature.LevelInstance,
 			Value: true,
@@ -193,10 +177,6 @@ func Test_instanceFeaturesToPb(t *testing.T) {
 			Enabled: false,
 			Source:  feature_pb.Source_SOURCE_UNSPECIFIED,
 		},
-		OidcLegacyIntrospection: &feature_pb.FeatureFlag{
-			Enabled: true,
-			Source:  feature_pb.Source_SOURCE_INSTANCE,
-		},
 		UserSchema: &feature_pb.FeatureFlag{
 			Enabled: true,
 			Source:  feature_pb.Source_SOURCE_INSTANCE,

internal/api/grpc/feature/v2beta/integration_test/feature_test.go

@@ -194,10 +194,6 @@ func TestServer_GetInstanceFeatures(t *testing.T) {
 					Enabled: false,
 					Source:  feature.Source_SOURCE_UNSPECIFIED,
 				},
-				OidcLegacyIntrospection: &feature.FeatureFlag{
-					Enabled: false,
-					Source:  feature.Source_SOURCE_UNSPECIFIED,
-				},
 				UserSchema: &feature.FeatureFlag{
 					Enabled: false,
 					Source:  feature.Source_SOURCE_UNSPECIFIED,
@@ -256,10 +252,6 @@ func TestServer_GetInstanceFeatures(t *testing.T) {
 					Enabled: false,
 					Source:  feature.Source_SOURCE_UNSPECIFIED,
 				},
-				OidcLegacyIntrospection: &feature.FeatureFlag{
-					Enabled: false,
-					Source:  feature.Source_SOURCE_UNSPECIFIED,
-				},
 				UserSchema: &feature.FeatureFlag{
 					Enabled: false,
 					Source:  feature.Source_SOURCE_UNSPECIFIED,
@@ -285,7 +277,6 @@ func TestServer_GetInstanceFeatures(t *testing.T) {
 			require.NoError(t, err)
 			assertFeatureFlag(t, tt.want.LoginDefaultOrg, got.LoginDefaultOrg)
 			assertFeatureFlag(t, tt.want.OidcTriggerIntrospectionProjections, got.OidcTriggerIntrospectionProjections)
-			assertFeatureFlag(t, tt.want.OidcLegacyIntrospection, got.OidcLegacyIntrospection)
 			assertFeatureFlag(t, tt.want.UserSchema, got.UserSchema)
 		})
 	}