[clang] [clang-tools-extra] [flang] [lldb] [llvm] [clang] Move options from clangDriver into new clangOptions library (NFC) (PR #163659)

[Michael Spencer via cfe-commits]

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

Looks good with some minor changes. This should still wait for another approval because it's a big change even though it's NFC.

https://github.com/llvm/llvm-project/pull/163659