Make sure nested worker get controlled if matching a service worker registration
<rdar://problem/102090425>
Pull request: https://github.com/WebKit/WebKit/pull/6288
Committed 256637@main (056c2a9cad9c): <https://commits.webkit.org/256637@main> Reviewed commits have been landed. Closing PR #6288 and removing active labels.
Bug 247958 – REGRESSION(256637@main) [WinCairo] worker tests constantly crashing in WebCore::ServiceWorkerData::isolatedCopy https://bugs.webkit.org/show_bug.cgi?id=247958