ImageBufferIOSurfaceBackend should get and put data in WP when in mapped mode
<rdar://problem/105972277>
Pull request: https://github.com/WebKit/WebKit/pull/10858
Committed 261130@main (812ce301dec9): <https://commits.webkit.org/261130@main> Reviewed commits have been landed. Closing PR #10858 and removing active labels.