chore(all): auto-regenerate gapics (#4314)

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#624

Changes:

fix!(aiplatform): Add C#, PHP and Ruby options for all AI Platform protos
  This is a breaking change for C#, PHP and Ruby, but none of those languages have published libraries for AI Platform.

  PiperOrigin-RevId: 381271921
  Source-Link: googleapis/googleapis@955fee2

go.mod

@@ -17,7 +17,7 @@ require (
 	golang.org/x/text v0.3.6
 	golang.org/x/tools v0.1.3
 	google.golang.org/api v0.49.0
-	google.golang.org/genproto v0.0.0-20210624174822-c5cf32407d0a
+	google.golang.org/genproto v0.0.0-20210624195500-8bfb893ecb84
 	google.golang.org/grpc v1.38.0
 	google.golang.org/protobuf v1.26.0
 )

go.sum

@@ -457,8 +457,8 @@ google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c/go.mod h1:UODoCrxH
 google.golang.org/genproto v0.0.0-20210604141403-392c879c8b08/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
 google.golang.org/genproto v0.0.0-20210608205507-b6d2f5bf0d7d/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
 google.golang.org/genproto v0.0.0-20210617175327-b9e0b3197ced/go.mod h1:SzzZ/N+nwJDaO1kznhnlzqS8ocJICar6hYhVyhi++24=
-google.golang.org/genproto v0.0.0-20210624174822-c5cf32407d0a h1:b5Bhxmy6Tppar7Yl4J6c6xF33YSBhkm2FtV9/ZQuBkQ=
-google.golang.org/genproto v0.0.0-20210624174822-c5cf32407d0a/go.mod h1:SzzZ/N+nwJDaO1kznhnlzqS8ocJICar6hYhVyhi++24=
+google.golang.org/genproto v0.0.0-20210624195500-8bfb893ecb84 h1:R1r5J0u6Cx+RNl/6mezTw6oA14cmKC96FeUwL6A9bd4=
+google.golang.org/genproto v0.0.0-20210624195500-8bfb893ecb84/go.mod h1:SzzZ/N+nwJDaO1kznhnlzqS8ocJICar6hYhVyhi++24=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=