Disable check_pkt_length in OVN-K for OvS Hardware Offload Cases

check_pkt_length cannot be offloaded without
1) sFlow offload patches in Openvswitch
2) Hardware driver support.

Since 1) will not be done anytime soon. We need a work around for the check_pkt_length issue.

4.11/4.12

Always

1. Any flow that has check_pkt_len()
  5-b: Pod -> NodePort Service traffic (Pod Backend - Different Node)
  6-b: Pod -> NodePort Service traffic (Host Backend - Different Node)
  4-b: Pod -> Cluster IP Service traffic (Host Backend - Different Node)
  10-b: Host Pod -> Cluster IP Service traffic (Host Backend - Different Node)
  11-b: Host Pod -> NodePort Service traffic (Pod Backend - Different Node)
  12-b: Host Pod -> NodePort Service traffic (Host Backend - Different Node)   

Poor performance due to upcalls when check_pkt_len() is not supported.

Good performance.

https://docs.google.com/spreadsheets/d/1LHY-Af-2kQHVwtW4aVdHnmwZLTiatiyf-ySffC8O5NM/edit#gid=670206692