[clang] [clang] Add clang-format-check-format instead to CLANG_TEST_DEPS (PR #204908)

[Björn Schäpers via cfe-commits]

HazardyKnusperkeks wrote:

This is ok for me, but I couldn't care less about CMake, so I will not vote.

https://github.com/llvm/llvm-project/pull/204908