fix: pipeline fixes

[skip ci]

stackit/internal/services/postgresflexalpha/postgresflex_acc_test.go

@@ -297,6 +297,9 @@ func TestAccInstanceWithUsers(t *testing.T) {
 	data := getExample()
 
 	userName := "testUser"
+	if pID, ok := os.LookupEnv("TF_ACC_PROJECT_ID"); !ok || pID == "" {
+		t.Errorf("TF_ACC_PROJECT_ID is not set")
+	}
 	data.Users = []User{
 		{
 			Name:      userName,