[llvm] [CMake] Configure ccache using command line options (PR #134857)

[Kajetan Puchalski via llvm-commits]

mrkajetanp wrote:

As suggested, reposting the changes to how we configure ccache on their own. This should be a non-functional change for Linux, but for Windows it should enable us to configure ccache in cases where previously we'd error with `Ccache configuration through CMake is not supported on Windows. Please use environment variables.`.
The primary difference with the previous PR is that everything is now passed as a CMake list instead of a ";" separated string which should make the behaviour more consistent across platforms.

https://github.com/llvm/llvm-project/pull/134857