Skip fib hash/nvgre_hash tests based at issue 18304 (#18368)

What is the motivation for this PR?
Xfail TC until issue #18304 resolved

How did you do it?
Add xfail

How did you verify/test it?
Run test suite - fib hash xfailed

Co-authored-by: AharonMalkin <[email protected]>

Author: roman_savchuk

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -1033,12 +1033,37 @@ fib/test_fib.py::test_nvgre_hash:
     conditions:
       - "asic_gen == 'spc1' and 't1-lag' in topo_name and https://github.com/sonic-net/sonic-mgmt/issues/17526"
 
+fib/test_fib.py::test_nvgre_hash[ipv6-ipv4]:
+  xfail:
+    reason: "Testcase ignored due to sonic-mgmt issue https://github.com/sonic-net/sonic-mgmt/issues/18304"
+    conditions:
+      - "https://github.com/sonic-net/sonic-mgmt/issues/18304 and 't0-isolated-d32u32s2' in topo_name and hwsku in ['Mellanox-SN5640-C512S2']"
+
+fib/test_fib.py::test_nvgre_hash[ipv6-ipv6]:
+  xfail:
+    reason: "Testcase ignored due to sonic-mgmt issue https://github.com/sonic-net/sonic-mgmt/issues/18304"
+    conditions:
+      - "https://github.com/sonic-net/sonic-mgmt/issues/18304 and 't0-isolated-d32u32s2' in topo_name and hwsku in ['Mellanox-SN5640-C512S2']"
+
 fib/test_fib.py::test_vxlan_hash:
   skip:
     reason: 'Vxlan hash test is not fully supported on VS platform; Not supported on M*'
     conditions:
       - "asic_type in ['vs'] or topo_type in ['m0', 'mx', 'm1']"
 
+fib/test_fib.py::test_vxlan_hash[ipv6-ipv4]:
+  xfail:
+    reason: "Testcase ignored due to sonic-mgmt issue https://github.com/sonic-net/sonic-mgmt/issues/18304"
+    conditions:
+      - "https://github.com/sonic-net/sonic-mgmt/issues/18304 and 't0-isolated-d32u32s2' in topo_name and hwsku in ['Mellanox-SN5640-C512S2']"
+      -
+
+fib/test_fib.py::test_vxlan_hash[ipv6-ipv6]:
+  xfail:
+    reason: "Testcase ignored due to sonic-mgmt issue https://github.com/sonic-net/sonic-mgmt/issues/18304"
+    conditions:
+      - "https://github.com/sonic-net/sonic-mgmt/issues/18304 and 't0-isolated-d32u32s2' in topo_name and hwsku in ['Mellanox-SN5640-C512S2']"
+
 #######################################
 #####   generic_config_updater    #####
 #######################################
@@ -1251,6 +1276,10 @@ hash/test_generic_hash.py::test_ecmp_hash:
     reason: 'ECMP hash not supported in broadcom SAI and Cisco 8000'
     conditions:
       - "asic_type in ['broadcom', 'cisco-8000']"
+  xfail:
+    reason: 'ECMP hash skipped due to issue https://github.com/sonic-net/sonic-mgmt/issues/18304'
+    conditions:
+      - "https://github.com/sonic-net/sonic-mgmt/issues/18304 and 't0-isolated-d32u32s2' in topo_name and hwsku in ['Mellanox-SN5640-C512S2']"
 
 hash/test_generic_hash.py::test_ecmp_hash[CRC-INNER_IP_PROTOCOL:
   skip: