[libcxx-commits] [libcxx] Rehome libcxx-builder docker image & attempt gentler termination. (PR #71604)

[Mark de Wever via libcxx-commits]

https://github.com/mordante approved this pull request.

Thanks for working on this.  LGTM modulo some comments. Please wait for @ldionne to approve too.

https://github.com/llvm/llvm-project/pull/71604