feat(users & groups): User & Groups Management GraphQL APIs + UI

[jjoyce0510]

Status
Ready for review

Changes
Adding GraphQL APIs for the following user and groups management capabilities:

• createGroup
• removeGroup
• removeUser
• addGroupMember
• removeGroupMember
• listUsers
• listGroups

And also the UI for listing all users and groups on DataHub, additionally allowing users with the MANAGE_USERS_AND_GROUPS permission to:

1. Delete users and groups
2. Create groups
3. Add and remove members from groups

Some additional misc. changes:

• add a "CorpUserStatus" aspect which determines whether the user is active or not.
• add a "list" API in the EntityResource which allows you to list entities from an elastic index. This builds on the "filter" api exposed by the SearchService

Each of these changes are prerequisites to the groups management UI we are working to build.

Screenshots!

Compatibility
Fully compatible with previous versions.

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable)

[shirshanka]

LGTM!