[clang-tools-extra] [clang-tidy] support string::contains (PR #110351)

[Nicolas van Kempen via cfe-commits]

================
@@ -104,6 +108,9 @@ struct basic_string_view {
   size_type rfind(const C* s, size_type pos, size_type count) const;
   size_type rfind(const C* s, size_type pos = npos) const;
 
+  bool contains(const C *s) const;
+  bool contains(C s) const;
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nicovank wrote:

```suggestion
  bool contains(const C *s) const;
  bool contains(C s) const;
  bool contains(basic_string_view sv) const;
```

https://github.com/llvm/llvm-project/pull/110351