[llvm] [GitHub] Fix slow sccache install on macOS by upgrading macOS version (PR #77165)

[Craig Hesling via llvm-commits]

linux4life798 wrote:

It looks like be are building properly on macOS-12 without the `PKG_CONFIG_PATH` workaround.

Here is another test run using `macOS-12` from eb38995d6493623e5368d2b395d6ccc6c01bd612. The macOS-12 has finished building and succeeded.

* The enabled llvm projects are `clang;lldb;libclc;lld`
* The build target was ""

https://github.com/linux4life798/llvm-project/actions/runs/7428836371/job/20216662446

https://github.com/llvm/llvm-project/pull/77165