Operation `CommitDiff ` on service `Diff` doesn't implement the full functionality expected by Gitlab CE

The following flags are not supported:

deltas_only
ignore_whitespace_change
paths

Because of this reason, we can't fully migrate this operation to Gitaly. We should implement support for these flags. This will require changes in gitaly-proto.

/cc @jacobvosmaer-gitlab @andrewn @ahmadsherif

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information