[clang-tools-extra] [clang-tidy][misc-include-cleaner]Avoid to insert same include header multiple times (PR #65431)

[Ding Fei via cfe-commits]

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@@ -209,14 +212,16 @@ void IncludeCleanerCheck::check(const MatchFinder::MatchResult &Result) {
     // main file.
     if (auto Replacement =
             HeaderIncludes.insert(llvm::StringRef{Spelling}.trim("\"<>"),
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danix800 wrote:

`HeaderIncludes` is NOT a container. This `insert` means to create a `tooling::Replacement` object rather than container insertion/emplacing.

https://github.com/llvm/llvm-project/pull/65431