[clang-tools-extra] Follow style configuration in clangd when inserting missing includes (PR #140594)

[Nathan Ridge via cfe-commits]

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@@ -142,6 +143,13 @@ std::vector<Diag> generateMissingIncludeDiagnostics(
 
     llvm::StringRef HeaderRef{Spelling};
     bool Angled = HeaderRef.starts_with("<");
+    for (auto Filter : AngledHeaders) {
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HighCommander4 wrote:

nit: iterate using `auto &`, the way we do [here](https://searchfox.org/llvm/rev/b9a709832cd96ff3405dd0da9c436d560d8a4f1c/clang-tools-extra/clangd/IncludeCleaner.cpp#63)

https://github.com/llvm/llvm-project/pull/140594