clang-tidy: removes ExcludeHeaderFilterRegex not available in LLVM 14

[mathetake]

This directive was introduced in #37317 but turns out this is not available in LLVM 14.
So for now we remove this. By the time we enable clang-tidy on CI we should find
a way to ignore it, but for now simply remove it so that we can run clang-tidy locally.

part of #28566

cc @phlax

[repokitteh-read-only]

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🐱

Caused by: #37378 was opened by mathetake.

see: more, trace.

[phlax]

lgtm, thanks @mathetake