WorkerCacheStorageConnection should check for its worker thread run loop to not be terminated when initialising its connection
<rdar://54340159>
Pull request: https://github.com/WebKit/WebKit/pull/2074
Committed 252328@main (f6fbd1d5f621): <https://commits.webkit.org/252328@main> Reviewed commits have been landed. Closing PR #2074 and removing active labels.