fix(ext/node): cancel pending ipc writes on channel close (#26504)
Fixes the issue described in
https://github.com/denoland/deno/issues/23882#issuecomment-2423316362.
The parent was starting to send a message right before the process would
exit, and the channel closed in the middle of the write. Unlike with
reads, we weren't cancelling the pending writes, which resulted in a
`Broken pipe` error surfacing to the user.
