RemoteImageDecoderAVFProxy leaks video frames through CG image cache
<rdar://problem/115834350>
Pull request: https://github.com/WebKit/WebKit/pull/18011
Pull request: https://github.com/WebKit/WebKit/pull/18012
Committed 268323@main (614cbf400057): <https://commits.webkit.org/268323@main> Reviewed commits have been landed. Closing PR #18012 and removing active labels.