Adjust ml-samples-submission pipeline to push branch directly

[scbedd]

Right now, we push the updated branch to a fork azure-sdk/azureml-samples -> submit PR from fork branch.

The issue is that the ML automation is not able to share the secrets to an action triggered against a fork. We need to adjust our pipelines such that

• instead of pushing to a fork, we push to a branch directly on the samples repo
• file PR against that

Awaiting confirmation from @singankit or @needuv on the account having the nececessary push permissions to that repo. At least a verbal confirmation that giving our account access to that repo is a possibility. I can integrate on repos that aren't azureml owned :)

[azure-sdk]

Label prediction was below confidence level 0.6 for Model:ServiceLabels: 'Service Bus:0.13767773,Storage:0.10190728,Machine Learning:0.08564497'