[llvm] [Github] Add repository checks to release-binaries workflow (PR #84437)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

> People were observing that the job was running on a schedule in their forks. This only happens on old forks, but those probably exist in great number given how prolific LLVM is.

Can you elaborate on what mechanisms are involved here? I remember seeing something on this topic somewhere, but don't remember the specifics. Forks of repos made after date X don't run scheduled actions automatically, unless fork user does Y to enable scheduled actions. Or did this extend to any kind of actions, e.g. ones with a regular `push:` trigger as well?

https://github.com/llvm/llvm-project/pull/84437