fix(ws server): fix shutdown on connection closed (#1103)
* fix(ws server): fix flaky shutdown test * Update server/src/transport/ws.rs * Update server/src/transport/ws.rs * fix interval stream bug * Update server/src/transport/ws.rs * Update server/src/transport/ws.rs * Update server/src/transport/ws.rs * Update server/src/transport/ws.rs * check conn_tx.closed as well * add more tests + cleanup * fix nit * Update server/src/tests/ws.rs * add comment in weird test * rewrite tests without sleeps * remove needless result * fix compile warn