feat(policy): add MeshTCPRoute api with validation

[bartsmykla]

Add MeshTCPRoute api with validation

Checklist prior to review

• Link to relevant issue as well as docs and UI issues
  • MeshTCPRoute implementation #6787
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS
  • it won't
• Tests (Unit test, E2E tests, manual test on universal and k8s)
• Do you need to update UPGRADE.md?
  • it's a new policy, so there is no need
• Does it need to be backported according to the backporting policy?
  • it's a new policy, so there is no need
• Do you need to explicitly set a > Changelog: entry here or add a ci/ label to run fewer/more tests?
  • nope

Changelog: feat(policy): add MeshTCPRoute

[michaelbeaumont]

LGTM