std.Target: Remove `hsail`/`hsail64` arch tags.

This seems to just be dead.

See: https://github.com/search?q=repo%3Allvm%2Fllvm-project%20hsail&type=code
See: https://github.com/HSAFoundation/HSAIL-Tools/commits/master
f1e0c35db4Alex Rønne Petersen committed on 7/21/2024, 8:38:30 PMparent67a052d
6 files changedLine totals unavailable