Add support for --verbatim to getPatchID

Add support for the --verbatim option to getPatchID.

--verbatim

    Calculate the patch-id of the input as it is given, do not strip any whitespace.

As discussed in #450391 (comment 2060578582), we want to explore using --verbatim when generating patch-ids. We would like this to be a specifiable option, so we can feature flag/test its effect.