[clang] [Driver] Don't alias -mstrict-align to -mno-unaligned-access (PR #85350)

[Lu Weining via cfe-commits]

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

LGTM from LoongArch side as GCC only have `-m[no-]strict-align`.
BTW, should clang release notes be updated for this change?

https://github.com/llvm/llvm-project/pull/85350