CI: adjust UE attach timeout handling

- Set default attach_timeout to 40s
- Increase timeout only after failed attach attempts

This modification addresses an issue in the RFSim-5G 2x2 test where the UE
often fails to attach within the initial 20s window. The timeout may cause
the UE to restart, which leads to two UEs appearing in the gNB log. By
increasing the initial timeout to 40s, we avoid unnecessary restarts.

ci-scripts/cls_module.py

@@ -111,11 +111,10 @@ class Module_UE:
 			return self._collectTrace(ctx)
 		return None
 
-	def attach(self, attach_tries = 3, attach_timeout = 0):
+	def attach(self, attach_tries = 3, attach_timeout = 40):
 		ip = None
 		while attach_tries > 0:
 			self._command(self.cmd_dict["attach"])
-			attach_timeout += 20
 			timeout = attach_timeout
 			logging.debug("Waiting for IP address to be assigned")
 			ip = self.getIP(silent=False, reportNonZero=True)
@@ -126,6 +125,7 @@ class Module_UE:
 			if ip:
 				break
 			logging.warning(f"UE did not receive IP address after {attach_timeout} s, detaching")
+			attach_timeout += 20
 			attach_tries -= 1
 			self._command(self.cmd_dict["detach"])
 			time.sleep(5)