[clang-tools-extra] [clang-tidy][NFC] Refactor `modernize-use-trailing-return-type-check` check code and tests (PR #140759)

[Nicolas van Kempen via cfe-commits]

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@@ -28,7 +27,7 @@ struct ClassifiedToken {
 class UseTrailingReturnTypeCheck : public ClangTidyCheck {
 public:
   UseTrailingReturnTypeCheck(StringRef Name, ClangTidyContext *Context)
-      : ClangTidyCheck(Name, Context) {}
+      : ClangTidyCheck(Name, Context) {};
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nicovank wrote:

Is there a need for this semicolon?

https://github.com/llvm/llvm-project/pull/140759