Rename VideoFullscreenInterfaceAVKit to VideoFullscreenInterfaceIOS
Pull request: https://github.com/WebKit/WebKit/pull/23071
Committed 273363@main (78ed1f1974b1): <https://commits.webkit.org/273363@main> Reviewed commits have been landed. Closing PR #23071 and removing active labels.
<rdar://problem/121451670>