Support Omega manufactured solution default case only

Author: cbegeman

polaris/ocean/tasks/manufactured_solution/forward.yaml

@@ -37,3 +37,8 @@ mpas-ocean:
     config_compute_active_tracer_budgets: false
     config_disable_vel_vmix: true
     config_disable_tr_all_tend: true
+
+Omega:
+  Tendencies:
+    VelDiffTendencyEnable: false
+    VelHyperDiffTendencyEnable: false