chore: remove all uses of github.com/golang/protobuf (googleapis#9744)

Fixes: googleapis#4273

Author: codyoss

bigtable/admin.go

@@ -705,12 +705,12 @@ func newSnapshotInfo(snapshot *btapb.Snapshot) (*SnapshotInfo, error) {
 	if err := snapshot.CreateTime.CheckValid(); err != nil {
 		return nil, fmt.Errorf("invalid createTime: %w", err)
 	}
-	createTime := snapshot.CreateTime.AsTime()
+	createTime := snapshot.GetCreateTime().AsTime()
 
 	if err := snapshot.DeleteTime.CheckValid(); err != nil {
 		return nil, fmt.Errorf("invalid deleteTime: %v", err)
 	}
-	deleteTime := snapshot.DeleteTime.AsTime()
+	deleteTime := snapshot.GetDeleteTime().AsTime()
 
 	return &SnapshotInfo{
 		Name:        name,
@@ -2057,17 +2057,17 @@ func newBackupInfo(backup *btapb.Backup) (*BackupInfo, error) {
 	if err := backup.StartTime.CheckValid(); err != nil {
 		return nil, fmt.Errorf("invalid startTime: %v", err)
 	}
-	startTime := backup.StartTime.AsTime()
+	startTime := backup.GetStartTime().AsTime()
 
 	if err := backup.EndTime.CheckValid(); err != nil {
 		return nil, fmt.Errorf("invalid endTime: %v", err)
 	}
-	endTime := backup.EndTime.AsTime()
+	endTime := backup.GetEndTime().AsTime()
 
 	if err := backup.ExpireTime.CheckValid(); err != nil {
 		return nil, fmt.Errorf("invalid expireTime: %v", err)
 	}
-	expireTime := backup.ExpireTime.AsTime()
+	expireTime := backup.GetExpireTime().AsTime()
 	encryptionInfo := newEncryptionInfo(backup.EncryptionInfo)
 	bi := BackupInfo{
 		Name:           name,

cloudbuild/apiv1/cloud_build_client.go

@@ -5,7 +5,6 @@ go 1.19
 require (
 	cloud.google.com/go/iam v1.1.7
 	cloud.google.com/go/longrunning v0.5.6
-	github.com/golang/protobuf v1.5.4
 	github.com/googleapis/gax-go/v2 v2.12.3
 	google.golang.org/api v0.172.0
 	google.golang.org/genproto v0.0.0-20240213162025-012b6fc9bca9
@@ -22,6 +21,7 @@ require (
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/s2a-go v0.1.7 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
 	go.opencensus.io v0.24.0 // indirect

cloudbuild/go.mod

@@ -5,7 +5,6 @@ go 1.19
 require (
 	cloud.google.com/go v0.112.2
 	cloud.google.com/go/longrunning v0.5.6
-	github.com/golang/protobuf v1.5.4
 	github.com/google/go-cmp v0.6.0
 	github.com/googleapis/gax-go/v2 v2.12.3
 	google.golang.org/api v0.172.0
@@ -22,6 +21,7 @@ require (
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/s2a-go v0.1.7 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
 	go.opencensus.io v0.24.0 // indirect