RTCDtlsTransport should get closed when its peer connection gets closed
Pull request: https://github.com/WebKit/WebKit/pull/2843
Committed 252948@main (61a20216a8a6): <https://commits.webkit.org/252948@main> Reviewed commits have been landed. Closing PR #2843 and removing active labels.
<rdar://problem/97787451>