IPC stream connection sends should fail immediately when connection closes
<rdar://problem/91039929>
Created attachment 458695 [details] Patch
Created attachment 458696 [details] Patch
Created attachment 458722 [details] For landing
Committed r293723 (250211@main): <https://commits.webkit.org/250211@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 458722 [details].