Revert
741978d727 and things that landed on top of it.
741978d727 made clang produce output that's 2x as large at least in
sanitizer builds. https://reviews.llvm.org/D83892#2470185 has a
standalone repro.
This reverts the following commits:
Revert "[clang][cli] Port CodeGenOpts simple string flags to new option parsing system"
This reverts commit
95d3cc67caac04668ef808f65c30ced60ed14f5d.
Revert "[clang][cli] Port LangOpts simple string based options to new option parsing system"
This reverts commit
aec2991d083a9c5b92f94d84a7b3a7bbed405af8.
Revert "[clang][cli] Streamline MarshallingInfoFlag description"
This reverts commit
27b7d646886d499c70dec3481dfc3c82dfc43dd7.
Revert "[clang][cli] Port LangOpts option flags to new option parsing system"
This reverts commit
383778e2171b4993f555433745466e211e713548.
Revert "[clang][cli] Port CodeGen option flags to new option parsing system"
This reverts commit
741978d727a445fa279d5952a86ea634adb7dc52.