chore(all): auto-regenerate .pb.go files (googleapis#706)

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#5010

Changes:

chore: regenerate API index

  Source-Link: googleapis/googleapis@d5b19f1

feat(dialogflow/cx): added API for changelogs docs: clarified semantic of the streaming APIs
  PiperOrigin-RevId: 404659561
  Source-Link: googleapis/googleapis@19943c1

chore: regenerate API index

  Source-Link: googleapis/googleapis@180ec36

feat(dialogflow/cx): added API for changelogs docs: clarified semantic of the streaming APIs
  PiperOrigin-RevId: 404644767
  Source-Link: googleapis/googleapis@55fd11b

feat: Publish Traffic Director log entry proto
  Committer: @karthikbox
  PiperOrigin-RevId: 404630120
  Source-Link: googleapis/googleapis@30eeb27

fix(aiplatform): Remove invalid resource annotations
  Note: normally removing an annotation is a breaking change. However, the annotation here is invalid as it doesn't refer to a string field. Any generator which actually tried to use it in a meaningful way would either generate invalid code or fail to generate at all. Therefore removing it can't break anything.
  PiperOrigin-RevId: 404455880
  Source-Link: googleapis/googleapis@dc83df8

build(nodejs): correct artifact name for npm
  PiperOrigin-RevId: 404411760
  Source-Link: googleapis/googleapis@3fe45e2