Also, replace the existing actionscript implementation with a python
script that can be run outside of GitHub Actions. The intention is
that going forward, all github action functionality would be implemented
in this script.
Reviewed By: kwk
Differential Revision: https://reviews.llvm.org/D116762
This adds a github action that will mention a team called issue-subscribers-$LABEL
whenever a label is added to a bug. Mentioning the team will automatically
subscribe all team members to the bug.
Differential Revision: https://reviews.llvm.org/D114412