peering: initial sync (#12842)
- Add endpoints related to peering: read, list, generate token, initiate peering
- Update node/service/check table indexing to account for peers
- Foundational changes for pushing service updates to a peer
- Plumb peer name through Health.ServiceNodes path
see: ENT-1765, ENT-1280, ENT-1283, ENT-1283, ENT-1756, ENT-1739, ENT-1750, ENT-1679,
ENT-1709, ENT-1704, ENT-1690, ENT-1689, ENT-1702, ENT-1701, ENT-1683, ENT-1663,
ENT-1650, ENT-1678, ENT-1628, ENT-1658, ENT-1640, ENT-1637, ENT-1597, ENT-1634,
ENT-1613, ENT-1616, ENT-1617, ENT-1591, ENT-1588, ENT-1596, ENT-1572, ENT-1555
Co-authored-by: R.B. Boyer <rb@hashicorp.com>
Co-authored-by: freddygv <freddy@hashicorp.com>
Co-authored-by: Chris S. Kim <ckim@hashicorp.com>
Co-authored-by: Evan Culver <eculver@hashicorp.com>
Co-authored-by: Nitya Dhanushkodi <nitya@hashicorp.com>