[github] remove more caches after downloading things#133129

gburgessiv merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

gburgessiv:github-remove-apt-caches-after-updating-linux-ci-containergburgessiv/llvm-project:github-remove-apt-caches-after-updating-linux-ci-containerCopy head branch name to clipboard