[clang] [flang] [flang][Driver] Support -print-supported-cpus and associated aliases (PR #117199)

[Jan Patrick Lehr via cfe-commits]

jplehr wrote:

I believe this results in tests failures on our bot: https://lab.llvm.org/staging/#/builders/105/builds/9796 (and a few others)

https://github.com/llvm/llvm-project/pull/117199