Today, we disable the linear scan and graph coloring register allocators. Make them support vectors, and remove all of the RegisterSet hacks of the form (useWASMSIMD() ? Width128 : Width64) when constructing clobber sets.
<rdar://problem/101296695>
Pull request: https://github.com/WebKit/WebKit/pull/7002
Committed 257519@main (244d75cd9da4): <https://commits.webkit.org/257519@main> Reviewed commits have been landed. Closing PR #7002 and removing active labels.