[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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@@ -134,7 +134,7 @@ class ClangdLSPServer : private ClangdServer::Callbacks,
   void onWorkspaceSymbol(const WorkspaceSymbolParams &,
                          Callback<std::vector<SymbolInformation>>);
   void onPrepareRename(const TextDocumentPositionParams &,
-                       Callback<std::optional<Range>>);
+                       Callback<std::optional<PrepareRenameResult>>);
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kadircet wrote:

you can drop the optional now, we either return an Error or PrepareRenameResult

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