sceNetAdhoc: Forget a blocking PTP connect when it's done

Its entry in sendTargetPeers stayed, so the next blocking connect from
the same thread on a socket that got the same id returned BUSY
(pspautotests net/adhoc/pair/basic, connect to a closed port, after a
connected socket was closed).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Core/HLE/sceNetAdhoc.cpp

@@ -1361,6 +1361,8 @@ static void __AdhocSocketNotify(u64 userdata, int cyclesLate) {
 			CoreTiming::ScheduleEvent(usToCycles(delayUS) - cyclesLate, adhocSocketNotifyEvent, userdata);
 			return;
 		}
+		// Done with it, or the next blocking connect on a socket that reuses this id would be BUSY.
+		sendTargetPeers.erase(userdata);
 		break;
 
 	case PTP_FLUSH: