[clang-tools-extra] [clang-tidy] Ignore standard tag dispatch types in readability-named-parameter (PR #208730)

[via cfe-commits]

xxxxbc wrote:

Thanks for the review! Addressed all three:

1. Added a test with a non-standard type (`NotATag`) to confirm types outside `TagDispatchTypes` still trigger a warning.
2. Reformatted the default list in the docs into a shorter, per-line code block.
3. Moved the default list into a `DefaultTagDispatchTypes` file-local global variable.


https://github.com/llvm/llvm-project/pull/208730