[clang] [clang-tools-extra] [clang-tidy] Add experimental header-filter matching (PR #194370)

[Zeyi Xu via cfe-commits]

================
@@ -63,6 +63,9 @@ Configuration files:
   CustomChecks                 - Array of user defined checks based on
                                  Clang-Query syntax.
   ExcludeHeaderFilterRegex     - Same as '--exclude-header-filter'.
+  ExperimentalHeaderFilterMatching
----------------
zeyi2 wrote:

We may need to reformat it into this later:

```
ExperimentalHeaderFilterMatching - Same as
                                   '--experimental...'
```

https://github.com/llvm/llvm-project/pull/194370