Description of problem:

Pipelines as Code does not provide feedback to Gitlab users if a matched "on-push" `PipelineRun` is malformed.

Workaround: Manually figure out what is wrong in the Pipeline YAML and correct it.

Prerequisites (if any, like setup, operators/versions):

OpenShift Pipelines (on Konflux)

Steps to Reproduce

1. Connect a Gitlab repository to Pipelines as Code
2. Create a PipelineRun YAML that triggers on a push event
3. Modify the YAML such that it is malformed

Actual results:

No feedback is provided to users

Expected results:

Feedback is provided to the SCM repository

Reproducibility (Always/Intermittent/Only Once):

Always

Acceptance criteria: 

Definition of Done:

Build Details:

Additional info (Such as Logs, Screenshots, etc):

 *