chore(all): auto-regenerate .pb.go files (googleapis#784)

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
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Corresponding google-cloud-go PR: googleapis/google-cloud-go#5808

Changes:

feat(dialogflow/cx): added support for locking an agent for changes feat: added data format specification for export agent
  PiperOrigin-RevId: 437848093
  Source-Link: googleapis/googleapis@daffb06

chore(gaming): remove unused imports
  PiperOrigin-RevId: 437796977
  Source-Link: googleapis/googleapis@9346947

chore(googleads): update a few Bazel import statements
  Committer: @aohren
  PiperOrigin-RevId: 437728534
  Source-Link: googleapis/googleapis@e1b5a01

chore: regenerate API index

  Source-Link: googleapis/googleapis@36e9ea9

feat: Publish BigQuery Analytics Hub API v1beta1 client
  PiperOrigin-RevId: 437365521
  Source-Link: googleapis/googleapis@b08a6a2

chore: regenerate API index

  Source-Link: googleapis/googleapis@7ee73a3

docs(retail): users can self enroll retail search feature on cloud console docs: suggest search users not to send IP and use hashed user id docs: deprecate request_id in ImportProductsRequest docs: deprecate search dynamic_facet_spec and suggest to config on cloud console docs: keep the API doc up-to-date with recent changes feat: add new AddLocalInventories and RemoveLocalInventories APIs feat: users cannot switch to empty default branch unless force override feat: allow search users to skip validation for invalid boost specs feat: support search personalization feat: search returns applied control ids in the response
  PiperOrigin-RevId: 437355889
  Source-Link: googleapis/googleapis@4d00815

feat(dialogflow/cx): added support for locking an agent for changes feat: added data format specification for export agent
  PiperOrigin-RevId: 437338899
  Source-Link: googleapis/googleapis@94287f4

chore(bazel): colocate Go targets in google/api with same importpath
  PiperOrigin-RevId: 437269160
  Source-Link: googleapis/googleapis@651416f

docs: clarified the deprecation of TEMPLATE in intent training phrase type
  PiperOrigin-RevId: 437265289
  Source-Link: googleapis/googleapis@8e6b72f

feat(dlp): new Bytes and File types: POWERPOINT and EXCEL
  PiperOrigin-RevId: 437260831
  Source-Link: googleapis/googleapis@3c34a40