installer/config: add the role setup

[Vicente-Cheng]

Problem:
We tried to support various roles, so the installer need the related changes.

Solution:
Add an interactive part for role selection. Also, we need to add the related label for it.

Related Issue:
harvester/harvester#4786

Test plan:
We can check this feature with two parts as below.

1. 3 node cluster with one worker node. (Should only have one management(master) in the cluster)

• create a cluster with three nodes
• choose worker role on the second or third node
• make sure the final cluster only has one management(master)

2. 5 node cluster (to test promote will promote the management role first)

• create a cluster with five nodes
• choose management role on the fifth node
• remove the second or third management (master) node
• it should promote the fifth node instead fourth node

[ibrokethecloud]

lgtm. thanks.