* Feat: vela status --tree
Signed-off-by: Somefive <yd219913@alibaba-inc.com>

* Feat: support show not-deployed clusters
Signed-off-by: Somefive <yd219913@alibaba-inc.com>

* Fix: add tests
Signed-off-by: Somefive <yd219913@alibaba-inc.com>

* Fix: add multicluster e2e coverage
Signed-off-by: Somefive <yd219913@alibaba-inc.com>

* Chore: minor fix
Signed-off-by: Somefive <yd219913@alibaba-inc.com>