chore(all): auto-regenerate .pb.go files (#612)

This is an auto-generated regeneration of the .pb.go files by
cloud.google.com/go/internal/gapicgen. Once this PR is submitted, genbot will
update the corresponding PR to depend on the newer version of go-genproto, and
assign reviewers. Whilst this or any regen PR is open in go-genproto, genbot
will not create any more regeneration PRs. If all regen PRs are closed,
gapicgen will create a new set of regeneration PRs once per night.

If you have been assigned to review this PR, please:

- Ensure that CI is passing. If it's failing, it requires your manual attention.
- Approve and submit this PR if you believe it's ready to ship. That will prompt
genbot to assign reviewers to the google-cloud-go PR.

Corresponding google-cloud-go PR: googleapis/google-cloud-go#4214

Changes:

chore(bigquery/storage): migrate storage/v1beta2 to the Ruby microgenerator chore: fix package name for storage/v1beta1 (unpublished) Committer: @virost
  PiperOrigin-RevId: 377367726
  Source-Link: googleapis/googleapis@6afe792

chore: migrate workflow/vulnerability to the PHP microgenerator
  Committer: @miraleung
  PiperOrigin-RevId: 377322732
  Source-Link: googleapis/googleapis@5b4adc8

chore: migrate language/v1beta1 to the PHP microgenerator
  Committer: @miraleung
  PiperOrigin-RevId: 377322516
  Source-Link: googleapis/googleapis@a37ec28

feat: Add the `principal` field to the ServiceAccountDelegationInfo proto. Modify some field level comments with new details and examples.
  PiperOrigin-RevId: 377318673
  Source-Link: googleapis/googleapis@ba89dac

chore(kms): migrate KMS to the PHP microgenerator
  Committer: @miraleung
  PiperOrigin-RevId: 377315628
  Source-Link: googleapis/googleapis@e91939e

chore(pubsub): migrate pubsub to the PHP microgenerator
  Committer: @miraleung
  PiperOrigin-RevId: 377315573
  Source-Link: googleapis/googleapis@76a52a5