chore(Packit): Enable copr build for commit to main only.
switching copr_build job to commit rule as pull request job
may not need this with tests enabled in Testing Farm per PR.
chore(Packit): Enable TF tests job to run on pull request.
chore(Packit): Add fedora gating.yaml to synced files.
chore(TestingFarm): Add gating for fedora workflow
Adding basic gating smoke tests for fedora workflows
which are run in Testing Farm using tmt plan.
This workflow should allow us to have some
testing automation downstream (Fedora)
and catch package regressions in future.
Signed-off-by: Tibor Dudlák <tdudlak@redhat.com>