rsync -C doesn't properly resume after an error

On a linux system running gsutil version: 4.46,

Running 'gsutil rsync -C' will not continue uploading files after a resumable error, such as the following:
```Error copying file:///tmp/OUTPUT: ResumableUploadAbortException: Upload complete with 32476664 additional bytes left in stream; this can happen if a file changes size while being uploaded```

Start by reproducing the failure with `gsutil rsync -C` on Linux using a file that triggers the reported resumable upload error. Trace the rsync handling after `ResumableUploadAbortException`; done means the command continues uploading remaining files after that error.

Written by the indexing model from the issue text.