PLT-2655 - Fix UserGroup -project membership- and remove "users"

[paulnoirel]

Description

PLT-2655
To resolve the problems with group memberships encountered when using UserGroup, methods have been updated to utilise V3 APIs.
This is a breaking change: to reduce customer confusion, there will be a new way to create a group with members.

Changes

Create

import labelbox as lb
from labelbox.schema.user_group import UserGroup, UserGroupColor, UserGroupMember
API_KEY = "<API_KEY>"

client = lb.Client(API_KEY)
roles = client.get_roles()

users = (u for u in client.get_users() if u.org_role().name == 'None')
projects = client.get_projects()

user_group_with_roles = UserGroup(
    client=client,
    name="User Group with Explicit Roles",
    color=UserGroupColor.GREEN,
    members={
        UserGroupMember(user=next(users), role=roles["LABELER"]),
        UserGroupMember(user=next(users), role=roles["REVIEWER"]),
        UserGroupMember(user=next(users), role=roles["LABELER"])
    },
    projects={next(projects)},
    description="Basic test"
)
created_group_with_roles = user_group_with_roles.create()

Update

created_group_with_roles.members.add(UserGroupMember(next(users), roles["TEAM_MANAGER"]))

created_group_with_roles.projects.add(next(projects))

created_group_with_roles.description = "New group"

created_group_with_roles.update()

Delete

created_group_with_roles.delete()

Fixes # PLT-2655

Type of change

Please delete options that are not relevant.

• [] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Document change (fix typo or modifying any markdown files, code comments or anything in the examples folder only)

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