site replication: fix healing of bucket deletes. (#15377)

This PR changes the handling of bucket deletes for site 
replicated setups to hold on to deleted bucket state until 
it syncs to all the clusters participating in site replication.

cmd/object-api-input-checks.go

@@ -198,12 +198,12 @@ func checkPutObjectArgs(ctx context.Context, bucket, object string, obj getBucke
 }
 
 type getBucketInfoI interface {
-	GetBucketInfo(ctx context.Context, bucket string) (bucketInfo BucketInfo, err error)
+	GetBucketInfo(ctx context.Context, bucket string, opts BucketOptions) (bucketInfo BucketInfo, err error)
 }
 
 // Checks whether bucket exists and returns appropriate error if not.
 func checkBucketExist(ctx context.Context, bucket string, obj getBucketInfoI) error {
-	_, err := obj.GetBucketInfo(ctx, bucket)
+	_, err := obj.GetBucketInfo(ctx, bucket, BucketOptions{})
 	if err != nil {
 		return err
 	}