[clang-tools-extra] [clang-tidy] Emit deprecation warning for preformance-faster-string-find (PR #191922)

[Baranov Victor via cfe-commits]

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@@ -0,0 +1,32 @@
+// RUN: %check_clang_tidy %s performance-faster-string-find %t
+// RUN: %check_clang_tidy -check-suffix=CUSTOM %s performance-faster-string-find %t -- \
+// RUN:   -config="{CheckOptions: \
+// RUN:             {performance-faster-string-find.StringLikeClasses: \
+// RUN:                '::llvm::StringRef;'}}"
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vbvictor wrote:

I think we don't care about options here, can we just make minimal test-case for new diagnostic and that's it

https://github.com/llvm/llvm-project/pull/191922