PushService needs to be able to handle more than one set of push subscriptions for an origin in an application.
<rdar://problem/103187488>
Pull request: https://github.com/WebKit/WebKit/pull/7398
Committed 257669@main (bc9d83a37f64): <https://commits.webkit.org/257669@main> Reviewed commits have been landed. Closing PR #7398 and removing active labels.