[clang-tools-extra] [clang-tidy][NFC] Migrate tests away from `--match-partial-fixes` (PR #162851)

[Congcong Cai via cfe-commits]

HerrCai0907 wrote:

> Now the question is: do we want to remove the `--match-partial-fixes` option entirely? It _could_ break downstream users of `check_clang_tidy.py` and force them to migrate; is that a reason to keep it around though?

I think we should keep it but maybe add some deprecated warning to avoid breaking downstream clang-tidy's test.
But we will not officially maintain it anymore. (to be honest I don't think it will change a lot in the future)

https://github.com/llvm/llvm-project/pull/162851