KC-1478: Fix false 'Supported columns' warning in enterprise-info when requesting base fields

[sshrushanth-ks]

Summary

Fix enterprise-info --columns printing a false "Supported X columns" warning when the requested columns include a field that's always present in the output (user_id/email for users, team_uid/name for teams, node_id/name for nodes, role_id/name for roles) but isn't in the optional SUPPORTED_*_COLUMNS validation list. The command already succeeded and returned the field correctly — only the warning was wrong.

Changes

• keepercommander/commands/enterprise.py:
  • Add BASE_NODE_COLUMNS, BASE_USER_COLUMNS, BASE_TEAM_COLUMNS, BASE_ROLE_COLUMNS sets identifying the fields always included in each row regardless of --columns
  • Exclude the relevant base-columns set from the unsupported-column check for nodes, users, teams, and roles, so requesting a base field no longer trips the warning
• unit-tests/test_command_enterprise.py:
  • Add test confirming base fields (user_id, email, team_uid, node_id, role_id, name) no longer trigger the warning
  • Add test confirming a genuinely unsupported column still triggers the warning, so real validation errors aren't masked