Allow storing cache filenames by files hash instead of branch hash

[viceice]

What feature do you want to see added?

I like to store the cache files by computed files hash, so i can have multiple caches per branch.
Currently you can only have one cache per branch, so when my npm dependencies are updated on main, the old cache get's lost and branches which are not up-to-date won't use the old cache.

I've explicit disabled cache creation on non-default branches.

I'm using S3 and expiration policies, so old files get deleted automatically

Upstream changes

No response

Are you interested in contributing this feature?

maybe