Configure CARP on routers

Summary:
Add router CARP configuration using Jinja template and Salt state to deploy with Salt the CARP configuration.

Ref T2264

Test Plan: Apply state on router-002 and router-003 and verify CARP alias is configured.

Reviewers: dereckson, Duranzed

Reviewed By: dereckson, Duranzed

Maniphest Tasks: T2264

Differential Revision: https://devcentral.nasqueron.org/D3986