feat(robot): add robot team membership

[haarchri]

Description of your changes

uses https://github.com/upbound/up-sdk-go/pull/93 implements an option to assign an robot to a team

Fixes #

I have:

• [x] Read and followed Upbound's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [x] Added backport release-x.y labels to auto-backport this PR, as appropriate.

How has this code been tested

up robot team list chris -a upboundcare
TEAMS
test678

up robot team join test123 chris -a upboundcare 
Adding robot "chris" to team "test123"

up robot team list chris -a upboundcare
TEAMS
test678
test123

up robot team leave test123 chris -a upboundcare
Are you sure you want to remove this robot from the team? This cannot be undone [y/n]: y
Removing robot "chris" from team "test123"
Removed robot "chris" from team "test123"