[kvm]Avoid running ebtables test in KVM (sonic-net#6073)

*Avoid running ebtables test in KVM sonic-net/sonic-buildimage#11585
ebtables shouldn't be installed in KVM which blocks L2 forwarding. So removed the logic to install ebtables rules in SONiC. Hence removing the ebtables tests to be executed on KVM.

tests/kvmtest.sh

@@ -113,7 +113,6 @@ test_t0() {
       container_checker/test_container_checker.py \
       cacl/test_cacl_application.py \
       cacl/test_cacl_function.py \
-      cacl/test_ebtables_application.py \
       dhcp_relay/test_dhcp_relay.py \
       dhcp_relay/test_dhcpv6_relay.py \
       iface_namingmode/test_iface_namingmode.py \