[clang] [clang-tools-extra] [flang] [lld] [lldb] [llvm] [NFC] Rename Option parsing related files from OptXYZ -> OptionXYZ (PR #110692)

[David Blaikie via cfe-commits]

dwblaikie wrote:

Yeah, I think given how wide the change is and the speculative nature of the harm - probably best to abandon this for now. We can pick it up again if more folks speak up/more evidence is presented that it's problematic.

https://github.com/llvm/llvm-project/pull/110692