Merge branch 'rodrigo/remove-null-bytes-when-importing-diff' into 'master'

Remove null bytes when importing diffs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/156659



Merged-by: George Koltsov <gkoltsov@gitlab.com>
Approved-by: Luke Duncalfe <lduncalfe@gitlab.com>
Approved-by: George Koltsov <gkoltsov@gitlab.com>
Co-authored-by: Rodrigo Tomonari <rtomonari@gitlab.com>