To account for the underlying hardware change, we need to switch the architecture to arm64 for iOS queues on EWS and use 5 child processes for layout tests.
<rdar://problem/107720268>
Pull request: https://github.com/WebKit/WebKit/pull/12466
Committed 262675@main (40852a2866bc): <https://commits.webkit.org/262675@main> Reviewed commits have been landed. Closing PR #12466 and removing active labels.