Enhance bpf interface autodetection

[sridhartigera]

Description

This PR enhances the host interface auto-detection logic for the eBPF dataplane.
with the new approach, BPF endpoint manager builds a set of trees based on the netlink information of each host interface.

For example, if we have 2 interfaces in a bond and vlan on top of the bond, vlan interface is at the root of the tree, bond is at level 1 and physical interfaces are at the leaves. In the case of single standalone interfaces, each interface is a single node tree. Attaching Tc,XDP programs follows the below logic

1. If the interface is a root node, attach Tc.
2. If the interface is a leaf node, attach XDP.
3. If the interface is neither root nor leaf, it is ignored.

In the above process, XDP and Tc programs are removed from the interfaces when the interface moves down the tree.

Related issues/PRs

Todos

• Tests
• Documentation
• Release note

Release Note

Improve BPF interface autodetection to attach to vlan devices.

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✅ sridhartigera
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