An implementation of semi-automating the backporting
process.
This implementation has two steps:
1. Checking whether any associated issues are marked as bugs
If they do, mark with `auto-backport` label
2. On a successful merge, if there is a `auto-backport` label and there
are any tags of `backport-to-BRANCHNAME`, it calls an action that
cherry-picks the commits in the PR and automatically creates a PR to
those branches.
This action uses https://github.com/sqren/backport-github-actionFixes#3618
Signed-off-by: Derek Lee <derlee@redhat.com>
