[clang-tidy] Change checks to use new isLanguageVersionSupported restriction

Summary: Modifies all checks that are language version dependent to use `isLanguageVersionSupported`

Reviewers: jdoerfert, lebedev.ri, aaron.ballman, gribozavr2, Eugene.Zelenko

Reviewed By: gribozavr2

Subscribers: wuzish, nemanjai, xazax.hun, hiraditya, kbarton, steven_wu, dexonsmith, arphaman, lebedev.ri, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D75340
diff --git a/clang-tools-extra/clang-tidy/objc/MissingHashCheck.h b/clang-tools-extra/clang-tidy/objc/MissingHashCheck.h
index 4ac74d5..5e4b96a 100644
--- a/clang-tools-extra/clang-tidy/objc/MissingHashCheck.h
+++ b/clang-tools-extra/clang-tidy/objc/MissingHashCheck.h
@@ -24,6 +24,9 @@
 public:
   MissingHashCheck(StringRef Name, ClangTidyContext *Context)
       : ClangTidyCheck(Name, Context) {}
+  bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
+    return LangOpts.ObjC;
+  }
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };