[clang] [APINotes] Upstream Driver and Frontend options that enable API Notes (PR #73120)

[Saleem Abdulrasool via cfe-commits]

================
@@ -6720,6 +6720,17 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   Args.addOptOutFlag(CmdArgs, options::OPT_fassume_sane_operator_new,
                      options::OPT_fno_assume_sane_operator_new);
 
+  if (Args.hasFlag(options::OPT_fapinotes, options::OPT_fno_apinotes, false) ||
+      Args.hasArg(options::OPT_iapinotes_modules)) {
----------------
compnerd wrote:

Ah, now with the new version, it appears the double check is to deal with `-fapinotes-swift-version`?  I wonder if we can simplify this at all.  Is it invalid to pass along `-fapinotes-swift-version` if `-fapinotes` or `-fapinotes-modules` is not present?

https://github.com/llvm/llvm-project/pull/73120