Plumb top SecurityOriginData into ThreadableBlobRegistry
<rdar://problem/107024226>
Pull request: https://github.com/WebKit/WebKit/pull/11784
Pull request: https://github.com/WebKit/WebKit/pull/15085
Committed 266021@main (6f972bb0d497): <https://commits.webkit.org/266021@main> Reviewed commits have been landed. Closing PR #11784 and removing active labels.