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

[Chris B via cfe-commits]

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@@ -149,26 +149,12 @@ class ErrorReporter {
                                    Repl.getLength(), Repl.getReplacementText());
             auto &Entry = FileReplacements[R.getFilePath()];
             Replacements &Replacements = Entry.Replaces;
-            llvm::Error Err = Replacements.add(R);
+            llvm::Error Err = Replacements.addOrMerge(R);
             if (Err) {
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llvm-beanz wrote:

nit: I know this was pre-existing, but this is a more idomatic way to use llvm::Error.
```suggestion
            if (llvm::Error Err = Replacements.addOrMerge(R)) {
```

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