[clang-tools-extra] [clang-tidy] add modernize-use-constexpr check (PR #162741)

[via cfe-commits]

Jens0mat wrote:

> Hi, I don't think there are currently any blocking reviews missing. I think Julian didn't have time to address current feedback, and as soon as he will there would be next round of review.

Thanks @vbvictor, then I just hope he finds the time soon. I would be happy to test.

https://github.com/llvm/llvm-project/pull/162741