feat: actions v2 for functions (#9420)

# Which Problems Are Solved

Actions v2 are not executed in different functions, as provided by the
actions v1.

# How the Problems Are Solved

Add functionality to call actions v2 through OIDC and SAML logic to
complement tokens and SAMLResponses.

# Additional Changes

- Corrected testing for retrieved intent information
- Added testing for IDP types
- Corrected handling of context for issuer in SAML logic

# Additional Context

- Closes #7247 
- Dependent on https://github.com/zitadel/saml/pull/97
- docs for migration are done in separate issue:
https://github.com/zitadel/zitadel/issues/9456

---------

Co-authored-by: Silvan <27845747+adlerhurst@users.noreply.github.com>

internal/api/grpc/oidc/v2/integration_test/oidc_test.go

@@ -104,13 +104,11 @@ func TestServer_CreateCallback(t *testing.T) {
 	sessionResp := createSession(t, CTX, Instance.Users[integration.UserTypeOrgOwner].ID)
 
 	tests := []struct {
-		name      string
-		ctx       context.Context
-		req       *oidc_pb.CreateCallbackRequest
-		AuthError string
-		want      *oidc_pb.CreateCallbackResponse
-		wantURL   *url.URL
-		wantErr   bool
+		name    string
+		ctx     context.Context
+		req     *oidc_pb.CreateCallbackRequest
+		want    *oidc_pb.CreateCallbackResponse
+		wantErr bool
 	}{
 		{
 			name: "Not found",