policy entities now print group memberships per user

[taran-p]

Community Contribution License

All community contributions in this pull request are licensed to the project maintainers
under the terms of the Apache 2 license.
By creating this pull request I represent that I have the right to license the
contributions to the project maintainers under the Apache 2 license.

Description

mc idp ldap policy entities now prints group memberships for queried users. The combined effective policies of the user+group is also printed as "Effective Policies". This also occurs for mc admin policy entities

Currently there are two options for displaying this information:
OPTION 1 - Delimited by commas with wrapping at 80 characters

OPTION 2 - All entries on separate lines

Motivation and Context

minio/minio#20052

How to test this PR?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Unit tests added/updated
• Internal documentation updated
• Create a documentation update request here

[donatello]

I'm ok with option 2 as it is mainly for presentation. Programmatic access is available via the json option.