From chroot-git 2.33.1, we always have an executable named git
for other build infrastructure and lints.
Let's remove the shenanegan to find which git to be used, prepend the
path to chroot-git's git into $PATH, and let's the shell call the
correct git for us instead.
Turns xlint, version lint, and commit lint messages into warning or error
annotaions. All are printed with special highlighting in the action log and
summary. Xlint and version lint annotations are shown inline in the changes tab
and commit view. Annotations without line number are shown at line 1.