chore(all): auto-regenerate gapics (#3765)

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#544

Changes:

build(policytroubleshooter): update BUILD file for policy troubleshooter
  PiperOrigin-RevId: 360450845
  Source-Link: googleapis/googleapis@2f0798a

fix(functions): Fix service namespace in grpc_service_config.
  PiperOrigin-RevId: 360443299
  Source-Link: googleapis/googleapis@7cef880

chore(apigateway): Set namespaces for Ruby, PHP, and C# clients
  PiperOrigin-RevId: 360255957
  Source-Link: googleapis/googleapis@7f8b19b

Co-authored-by: Cody Oss <6331106+codyoss@users.noreply.github.com>

Author: yoshi-automation