chore: manually regenerate some files (#7036)

This PR is the new version of #7016.

Changes:

docs(batch): fix minor docstring formatting
  PiperOrigin-RevId: 487300638
  Source-Link: googleapis/googleapis@91b1a9b

feat(channel): add deal_code field to message Offer
  PiperOrigin-RevId: 487295068
  Source-Link: googleapis/googleapis@cac4b1e

feat(aiplatform): add instance_config to batch_prediction_job in aiplatform v1beta1 batch_prediction_job.proto
  PiperOrigin-RevId: 487284583
  Source-Link: googleapis/googleapis@17fb30e