[clang] [clang] Refactor clang's keyword enable/disable mechanism to allow lldb to re-use it (PR #165323)

[Michael Buch via cfe-commits]

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@@ -222,7 +171,7 @@ static KeywordStatus getKeywordStatusHelper(const LangOptions &LangOpts,
 
 /// Translates flags as specified in TokenKinds.def into keyword status
 /// in the given language standard.
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Michael137 wrote:

Can we move these docs into the header now?

https://github.com/llvm/llvm-project/pull/165323