ovn: do not send direct traffic between lports to conntrack

[zhangzujian]

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

• Bug fixes

Which issue(s) this PR fixes:

Fixes access from pod to node or outside the cluster in redhat/rocky 8.6 after merging #2987.

Now traffic via pod ip between pods will not be sent to conntrack by the following logical flows:

  table=6 (ls_in_pre_lb       ), priority=105  , match=(ip4 && ip4.dst == 10.16.0.0/16), action=(next;)
  table=6 (ls_in_pre_lb       ), priority=105  , match=(ip4 && ip4.dst == 100.64.0.0/16), action=(next;)
  table=6 (ls_in_pre_lb       ), priority=100  , match=(ip), action=(reg0[2] = 1; next;)

WHAT

🤖 Generated by Copilot at e7a3590

Remove SetLBCIDR feature from OVN interface and controller. This feature was deprecated and is no longer used to configure the load balancer service CIDR in OVN.

🤖 Generated by Copilot at e7a3590

Sing, O Muse, of the mighty OVN controller
That configures the network for the cloud of kube
And how its skilled developers, with wisdom and valor
Removed the SetLBCIDR feature, no longer of use

HOW

🤖 Generated by Copilot at e7a3590

• Remove the deprecated feature to set the load balancer service CIDR in OVN (link, link, link, link)