Add CAP_NET_RAW to BIRD to use SO_BINDTODEVICE option

[zolug]

Describe the bug
BGP session did not get established:
FE failed to establish socket for IPv6 BGP session due to error during SO_BINDTODEVICE call.

To Reproduce
Error popped up when deploying Meridio in an EST "self service" k8s cluster.

Expected behavior
BGP session gets esatblished.

Context

• Kernel: 5.4.0-42
• Kubernetes: 1.24
• Spire: 1.2.2
• Network Service Mesh: 1.5.0
• Meridio: 0.7.1

Logs

2022-08-23 11:26:31.722 NBR-gateway2: Connecting to 100:100::150 from local address 100:100::1
2022-08-23 11:26:31.722 NBR-gateway2: Socket error: SO_BINDTODEVICE: Operation not permitted
2022-08-23 11:26:31.722 NBR-gateway2: Connection closed
2022-08-23 11:26:31.727 NBR-gateway2: Connect delayed by 5 seconds

kind-control-plane Ready control-plane 131m v1.24.0 172.18.0.4 Ubuntu 21.10 5.4.0-42-generic containerd://1.6.4
kind-worker Ready 130m v1.24.0 172.18.0.3 Ubuntu 21.10 5.4.0-42-generic containerd://1.6.4
kind-worker2 Ready 130m v1.24.0 172.18.0.2 Ubuntu 21.10 5.4.0-42-generic containerd://1.6.4

root@kind-worker:/# uname -a
Linux kind-worker 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux