[compiler-rt] [Darwin] Add darwin-remote feature for remote darwin test targets (#174905)

Some tests are already supported on "remote" devices and simulators.
However, there is currently no way to distinguish a remote macOS host
from a local one.

This adds the darwin-remote feature which is common to all test targets
which use a wrapper script (e.g. iossim_run.py).

rdar://167735355

---------

Co-authored-by: Dan Blackwell <danblackwell95@gmail.com>
GitOrigin-RevId: 65945ec2ccac5a974cf918e5bde035b7a551ef9b
30 files changed