chore: improve integration tests (#8727)

Improve integration tests:
- spliting the tests in TokenExchange to isolated instances and in
parallel
- corrected some test structure so that the check for Details is no done
anymore if the test already failed
- replace required-calls with assert-calls to not stop the testing
- add gofakeit for application, project and usernames(emails)
- add eventually checks for testing in actions v2, so the request only
get called when the execution is defined
- check for length of results in list/search endpoints to avoid index
errors

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

@@ -99,7 +99,7 @@ func TestServer_SetInstanceFeatures(t *testing.T) {
 			})
 			got, err := Client.SetInstanceFeatures(tt.args.ctx, tt.args.req)
 			if tt.wantErr {
-				assert.Error(t, err)
+				require.Error(t, err)
 				return
 			}
 			require.NoError(t, err)
@@ -140,7 +140,7 @@ func TestServer_ResetInstanceFeatures(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			got, err := Client.ResetInstanceFeatures(tt.ctx, &feature.ResetInstanceFeaturesRequest{})
 			if tt.wantErr {
-				assert.Error(t, err)
+				require.Error(t, err)
 				return
 			}
 			require.NoError(t, err)
@@ -292,7 +292,7 @@ func TestServer_GetInstanceFeatures(t *testing.T) {
 			}
 			got, err := Client.GetInstanceFeatures(tt.args.ctx, tt.args.req)
 			if tt.wantErr {
-				assert.Error(t, err)
+				require.Error(t, err)
 				return
 			}
 			require.NoError(t, err)