[llvm-branch-commits] [CI][Github] Use newer sccache version in CI container (PR #149196)

[Aiden Grossman via llvm-branch-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/149196

I was having trouble with the version that ships in the ubuntu apt repository
and GCS based caching. The newer version works, so reintroduce the infra that
we had in 2c1d4b0404187f0162d3b2df64dae062e53c3c79 to download it.