Inform user if NAT traversal fails

[mjankauskas]

When NAT auto-configuration fails As a user I want to be informed and given link to documentation how to setup it manually.

AC:

• [x] When we know 100% when it fails, inform Provider provider

Tasks:

• [x] Tequilapi endpoint with NAT traversal status
• [x] Give CLI visibility to Provider for NAT traversal status
• [x] Tequilapi client for NAT traversal status
• [x] Give dVPN visibility to Provider for NAT traversal status

[donce]

Everything is done from the node side, only app side is left :)