[clang] [clang-tools-extra] [ASTMatchers][NFC] Replace `makeMatcher` function with CTAD (PR #147197)

[Nicolas van Kempen via cfe-commits]

https://github.com/nicovank approved this pull request.

Looks reasonable to me, thanks! Let's wait for one more set of eyes. I did a quick search for this on GitHub, most hits seem to be in LLVM forks/clones, so it doesn't seem this will impact users (good to check even if internal code).

https://github.com/llvm/llvm-project/pull/147197