[clang] [clang] replaced the usage of `asctime` with `strftime` (PR #99075)

[Aaron Ballman via cfe-commits]

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

Thank you, the changes LGTM assuming precommit CI doesn't discover anything. @cor3ntin are you happy with the changes as well?

https://github.com/llvm/llvm-project/pull/99075