[SAIP4] Update P4 PreIngress table to match on DST_MAC, Uncomment refers_to annotation for multicast group ID in redirect action, Assign priorities to ACL Ingress tables, Add tests for multicast programming, Add an ACL egress table with a src_mac match to middleblock & Add acl_forward to mirror_and_redirect.

[SAIP4] Update P4 PreIngress table to match on DST_MAC, Uncomment refers_to annotation for multicast group ID in redirect action, Assign priorities to ACL Ingress tables, Add tests for multicast programming, Add an ACL egress table with a src_mac match to middleblock & Add acl_forward to mirror_and_redirect. #2986