[llvm] [CMake][Support] Use /nologo when compiling BLAKE3 assembly sources on Windows (PR #106794)

[Matt Bolitho via llvm-commits]

MattBolitho wrote:

> LGTM, thanks!
> 
> The PR description, which gets used as the commit message when merged, still reflects the original variant of the patch, so it’d be good to tweak that as well. Or whoever merges it can fix up the wording before pressing merge as well.

Great, thanks for the feedback! I learned a few things. Description tweaked with the compatibility concerns included too.

https://github.com/llvm/llvm-project/pull/106794