Add the timeout value for check_bgp_session_state (#17290)

Author: weiguo-nvidia

tests/bgp/test_bgp_session.py

@@ -207,5 +207,5 @@ def test_bgp_session_interface_down(duthosts, rand_one_dut_hostname, fanouthosts
 
     pytest_assert(wait_until(120, 10, 30, duthost.critical_services_fully_started),
                   "Not all critical services are fully started")
-    pytest_assert(wait_until(60, 10, 0, duthost.check_bgp_session_state, list(setup['neighhosts'].keys())),
+    pytest_assert(wait_until(120, 10, 0, duthost.check_bgp_session_state, list(setup['neighhosts'].keys())),
                   "Not all BGP sessions are established on DUT")