chore: mirror commits from bazel-examples to downstreams

[alexeagle]

Note, I put deploy public keys into each of the downstream repos, the private keys are stored in GHA secrets in this repo.

NB: this assumes that the push is a fast-forward, meaning we prevent commits to those two downstream repos directly. If it's not a fast-forward, this new GHA workflow will fail on the git push step.

@gregmagolan are you okay with making any GHA or CCI edits to this repo and then letting the automation push them? If not I'll have to do something fancier here to rewrite commits on top of the history of the target repo, essentially a rebase.

---

Changes are visible to end-users: no

Test plan

Will run the new workflow manually at first.

[aspect-workflows]

Test

All tests were cache hits

27 tests (100.0%) were fully cached saving 15s.

---

Format      Lint      Lint [.]

[gregmagolan]

@gregmagolan are you okay with making any GHA or CCI edits to this repo and then letting the automation push them? If not I'll have to do something fancier here to rewrite commits on top of the history of the target repo, essentially a rebase.

Yes, this is fine and is the workflow I was expecting. Edits that affect Workflows in the downstream repos can be tested manually on branches in the downstream repos and then once tested put up in a PR to this repo.

[gregmagolan]

🌮