[EPIC] Processify reusable GHAs groundwork

[krsna-m]

Since the introduction of reusable actions and other improvements to Github Actions in general, some order, process, and migrations need to be done.

To set up the ground work to retire/migrate knobots over the following proposal of work can be done:

1. Provide a standard naming convention and directory layout for future actions

• Make reusables to use naming convention #60
• Combine style.yaml with new reusable one. #54
• Enforce reusable GHA naming convention #49

2. Make reusables enable-able via configuration

• Make reusable actions enable-able #55
• Figure out a way to get inputs from an external file/action #56
• Create toplevel workflow to consume reusables #57
• Solve for sync files across repos. #58

3. Switch over to new changes

• Repoint the reusable action consumers of repos to new naming convention #50
• Roll out changes of reusables and sync. #59
• Auto sync to new repos #61
• Create PAT for file syncer #71
• Make github actions required #66

The end result should allow repo owners to subscribe to which actions they would like to use. Ensure all reusables for repos to stay in sync and provide a standard way to add future actions.

[dprotaso]

Looks like we can spin down knobots since it looks like a github action in a repo can make a PR

ie. See the workflow here https://github.com/google/go-containerregistry/blob/main/.github/workflows/bump-deps.yaml