rebase: bump google.golang.org/protobuf from 1.27.1 to 1.28.0

Bumps [google.golang.org/protobuf](https://github.com/protocolbuffers/protobuf-go) from 1.27.1 to 1.28.0.
- [Release notes](https://github.com/protocolbuffers/protobuf-go/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf-go/blob/master/release.bash)
- [Commits](https://github.com/protocolbuffers/protobuf-go/compare/v1.27.1...v1.28.0)

---
updated-dependencies:
- dependency-name: google.golang.org/protobuf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/google.golang.org/protobuf/internal/strs/strings_pure.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build purego || appengine
 // +build purego appengine
 
 package strs

vendor/google.golang.org/protobuf/internal/strs/strings_unsafe.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !purego && !appengine
 // +build !purego,!appengine
 
 package strs