[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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@@ -696,7 +982,7 @@ renameOutsideFile(const NamedDecl &RenameDecl, llvm::StringRef MainFilePath,
                    FilePath);
     }
     auto RenameEdit =
-        buildRenameEdit(FilePath, AffectedFileCode, *RenameRanges, NewName);
+        buildRenameEdit(FilePath, AffectedFileCode, *RenameRanges, NewNames);
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kadircet wrote:

can you also move the logic that splits `NewName` into `NewNames` here? with a comment explaining why it's done for objc selectors?

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