Add `get-task-allow` entitlement to allow debuggers to attach to codesigned Julia (#37069)
Without this entitlement, users that wish to attach a debugger to the
codesign Julia executable they receive from `julialang.org` must strip
the codesigning signature from the Julia executable (e.g. via `codesign
--remove-signature Julia-1.5.app/Contents/Resources/bin/julia`). This
has its disadvantages, of course, so much better to simply declare to
the OS that it's alright for other processes to attach to this process.