Sam/wal g 2 and 3 (#1485)
* feature: wal-g v 3 and v 2
* chore: install, symlink
* chore: bump versions to test wal-g
* chore: build wal-g in ci and copy to binary cache on success
* chore: release wal-g 3
* chore: cover installing both versions of wal-g 2 and 3 2 as default
* chore: add the "v" as requested
* major version on pkg name to avoid collision can alias on install
* chore: cover in package build as well
* chore: better support for both versions, symlink default to v3 on new image
* chore: cleanup file
* chore: bump version for release
* chore: update dockerfiles
* chore: get aliases right
* chore: remove rendundant
* chore: testing suffix
* chore: bump for release
