chore(all): auto-regenerate gapics

This is an auto-generated regeneration of the gapic clients by
cloud.google.com/go/internal/gapicgen. Once the corresponding genproto PR is
submitted, genbot will update this PR with a newer dependency to the newer
version of genproto and assign reviewers to this PR.

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

- Ensure that the version of genproto in go.mod has been updated.
- 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.

Corresponding genproto PR: googleapis/go-genproto#923

Changes:

feat(spanner): Update transaction.proto to include different lock modes
  PiperOrigin-RevId: 481838475
  Source-Link: googleapis/googleapis@922f1f3

feat(kms): enable generation of Locations mixin
  PiperOrigin-RevId: 481650929
  Source-Link: googleapis/googleapis@62e82e7

feat(channel): Add CloudChannelReportsService to CloudChannel API
  PiperOrigin-RevId: 481642499
  Source-Link: googleapis/googleapis@0c78b0c

feat(securitycenter): Adding project/folder level parents to notification configs in SCC
  PiperOrigin-RevId: 481230115
  Source-Link: googleapis/googleapis@94efa50