docs: Updated ChecksummedData message definition to specify ctype=COR…

…D, and removed incorrect earlier attempt that set that annotation in the ReadObjectResponse message definition

docs: Clarified behavior of resumable upload cancellation
PiperOrigin-RevId: 520467605

google/storage/v2/storage.proto

@@ -240,6 +240,13 @@ service Storage {
   }
 
   // Cancels an in-progress resumable upload.
+  //
+  // Any attempts to write to the resumable upload after cancelling the upload
+  // will fail.
+  //
+  // The behavior for currently in progress write operations is not guaranteed -
+  // they could either complete before the cancellation or fail if the
+  // cancellation completes first.
   rpc CancelResumableWrite(CancelResumableWriteRequest)
       returns (CancelResumableWriteResponse) {
     option (google.api.routing) = {
@@ -903,7 +910,7 @@ message ReadObjectResponse {
   // empty for any given `ReadResponse`. This enables the service to inform the
   // client that the request is still live while it is running an operation to
   // generate more data.
-  ChecksummedData checksummed_data = 1 [ctype = CORD];
+  ChecksummedData checksummed_data = 1;
 
   // The checksums of the complete object. The client should compute one of
   // these checksums over the downloaded object and compare it against the value
@@ -2008,7 +2015,7 @@ message BucketAccessControl {
 // checksum.
 message ChecksummedData {
   // The data.
-  bytes content = 1;
+  bytes content = 1 [ctype = CORD];
 
   // If set, the CRC32C digest of the content field.
   optional fixed32 crc32c = 2;