chore: remove parallel running in integration tests (#8904)

# Which Problems Are Solved

Integration tests are flaky due to eventual consistency.

# How the Problems Are Solved

Remove t.Parallel so that less concurrent requests on multiple instance
happen. This allows the projections to catch up more easily.

# Additional Changes

- none

# Additional Context

- none

internal/api/grpc/org/v2/integration_test/org_test.go

@@ -42,8 +42,6 @@ func TestMain(m *testing.M) {
 }
 
 func TestServer_AddOrganization(t *testing.T) {
-	t.Parallel()
-
 	idpResp := Instance.AddGenericOAuthProvider(CTX, Instance.DefaultOrg.Id)
 
 	tests := []struct {

internal/api/grpc/org/v2/integration_test/query_test.go

@@ -27,8 +27,6 @@ type orgAttr struct {
 }
 
 func TestServer_ListOrganizations(t *testing.T) {
-	t.Parallel()
-
 	type args struct {
 		ctx context.Context
 		req *org.ListOrganizationsRequest