[generic_config_updater] add GCU ignore regex (#5509)

Summary: Add regex to unblock PR check

What is the motivation for this PR?
Add gcu ignore regex to unblock PR check

How did you do it?
Add regex pattern

How did you verify/test it?
Run unit test locally

tests/generic_config_updater/conftest.py

@@ -30,6 +30,9 @@ def ignore_expected_loganalyzer_exceptions(duthost, loganalyzer):
              ".*ERR swss[0-9]*#orchagent: :- getPortOperSpeed.*", # test_portchannel_interface replace mtu
              ".*ERR.*Failed to apply Json change.*", # validator need updater submodule
              ".*ERR GenericConfigUpdater: Change Applier: service invoked.*", # validator need updater submodule
+             ".*ERR swss[0-9]*#orchagent.*getResAvailableCounters.*", # test_monitor_config
+             ".*ERR swss[0-9]*#orchagent.*objectTypeGetAvailability.*", # test_monitor_config
+             ".*ERR dhcp_relay[0-9]*#dhcrelay.*", # test_dhcp_relay
          ]
          loganalyzer[duthost.hostname].ignore_regex.extend(ignoreRegex)
 
@@ -38,7 +41,7 @@ def check_image_version(duthost):
     """Skips this test if the SONiC image installed on DUT is older than 202112
 
     Args:
-        duthost: Hostname of DUT.
+        duthost: DUT host object.
 
     Returns:
         None.