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

[Tom Weaver via cfe-commits]

TomWeaver18 wrote:

I tried the fix in https://github.com/llvm/llvm-project/pull/205036 but was unable to get a resolution for the testing issue. Going to have to revert for now as the bot has been red for multiple days.

switching to FC did overcome the issue with finding diff being missing but the build system still needs some work to get going, you can read my comment and pasted test failure in the fix PR.

my apologies and good luck with future fixes.

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