[clang-tools-extra] Add support for renaming objc methods, even those with multiple selector pieces (PR #76466)

[kadir çetinkaya via cfe-commits]

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@@ -1029,5 +1172,151 @@ size_t renameRangeAdjustmentCost(ArrayRef<Range> Indexed, ArrayRef<Range> Lexed,
   return Cost;
 }
 
+static bool isMatchingSelectorName(const syntax::Token &Cur,
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kadircet wrote:

can you move all of these into anon namespace instead?

https://github.com/llvm/llvm-project/pull/76466