chore(all): auto-regenerate gapics (#5130)

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#718

Changes:

fix(compute): Move compute_small protos under its own directory (#681)
  * fix: Move compute_small protos under its own directory

  This is needed to fix API index.
  Also removed gapic_yaml file, as it is not needed anymore.

  * add README.md

  * fix typos

  * fix typos
  Source-Link: googleapis/googleapis@97cabab

feat(pubsublite): add C++ rules for Pub/Sub Lite
  PiperOrigin-RevId: 409506444
  Source-Link: googleapis/googleapis@2c411a8

docs(channel): Small clarification
  PiperOrigin-RevId: 409501969
  Source-Link: googleapis/googleapis@e03933d

feat(securitycenter): Added mute related APIs, proto messages and fields
  PiperOrigin-RevId: 409484892
  Source-Link: googleapis/googleapis@2de80fe