NSM datapath monitoring on proxy and TAPA NSC

[LionelJouin]

Description

Introduce optional NSM datapath monitoring/healing (or liveness check) checking if the connection is alive by pinging endpoint from the client. This option is for now available only between the proxy and LBs and has to be enabled via new env variables introduced in the proxy.

Introduce optional NSM datapath monitoring/healing (or liveness check) between the tapa and proxy. Has to be enabled via new env variables introduced in the proxy.

https://networkservicemesh.io/docs/concepts/specs/datapath_healing/

Issue link

Checklist

• Purpose
  • [x] Bug fix
  • [ ] New functionality
  • [ ] Documentation
  • [ ] Refactoring
  • [ ] CI
• Test
  • [ ] Unit test
  • [ ] E2E Test
  • [ ] Tested manually
• Introduce a breaking change
  • [ ] Yes (description required)
  • [x] No