Update test_dhcp_relay_stress Testcase: Remove XFail Conditions for d…

…ualtor (#16374)

What is the motivation for this PR?
Testcase fails under certain conditions in dualtor.
The XFail Conditions PR: #15811

How did you do it?
code: [ptf] Consider only expected packets for timeout by vkjammala-arista · Pull Request #21150 · sonic-net/sonic-buildimage
add dualtor fixture for test_dhcp_relay_stress by yyynini · Pull Request #16171 · sonic-net/sonic-mgmt

How did you verify/test it?
Testcase passed in dualtors.

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -395,24 +395,12 @@ dhcp_relay/test_dhcp_relay_stress.py::test_dhcp_relay_stress:
       - "platform in ['armhf-nokia_ixs7215_52x-r0']"
       - "asic_type in ['vs']"
 
-dhcp_relay/test_dhcp_relay_stress.py::test_dhcp_relay_stress[ack]:
-  xfail:
-    reason: "Testcase ignored on dualtor 202405"
-    conditions:
-      - "'dualtor' in topo_name and release in ['202405']"
-
 dhcp_relay/test_dhcp_relay_stress.py::test_dhcp_relay_stress[discover]:
   skip:
     reason: "Testcase ignored due to github issue: https://github.com/sonic-net/sonic-mgmt/issues/14851"
     conditions:
       - "https://github.com/sonic-net/sonic-mgmt/issues/14851"
 
-dhcp_relay/test_dhcp_relay_stress.py::test_dhcp_relay_stress[offer]:
-  xfail:
-    reason: "Testcase ignored on dualtor 202405"
-    conditions:
-      - "'dualtor' in topo_name and release in ['202405']"
-
 dhcp_relay/test_dhcp_relay_stress.py::test_dhcp_relay_stress[request]:
   skip:
     reason: "Testcase ignored due to github issue: https://github.com/sonic-net/sonic-mgmt/issues/14851"