[clang] [clang-tools-extra] [clangd] Make clangd run `format::cleanupAroundReplacements()` for all code actions just as clang-tidy does (PR #118569)

[kadir çetinkaya via cfe-commits]

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@@ -761,7 +762,35 @@ void StoreDiags::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
         return false;
       if (!isInsideMainFile(FixIt.RemoveRange.getBegin(), SM))
         return false;
-      Edits.push_back(toTextEdit(FixIt, SM, *LangOpts));
+
+      auto R = tooling::Replacement(SM, FixIt.RemoveRange, FixIt.CodeToInsert,
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kadircet wrote:

we deliberately do not apply formatting here due to latency concerns. there can be many fix-its available in a file and eagerly formatting all of them is likely to affect diagnostics latencies (as clangd potentially re-evaluates them at every keystroke).

can we rather perform this when the user asks for a code-action to be applied?

https://github.com/llvm/llvm-project/pull/118569