BED-4299 -- Display members of custom asset groups on Group Management

[maffkipp]

Description

GET api/v2/asset-groups/{asset_group_id}/members currently only queries the system_tags property to determine AG membership. This means any custom asset groups created through the API will not return any results via this endpoint, since membership in those groups is stored on the user_tags property instead.

This fix updates the query to check for the asset group tag in both the system_tags and user_tags field. I also added a check after the query to filter out nodes that do not have an exact match in the tag list, due to the potential for naming collisions with our StringContains query (for example, a custom asset group with tag test_tag_1 also pulling in nodes with tag test_tag).

Motivation and Context

If a user is creating custom asset groups via the API, we want them to be able to view and modify those asset groups via the Group Management page (or the api/v2/asset-groups/{asset_group_id}/members endpoint).

How Has This Been Tested?

• Added integration tests to our graph query to make sure it returns custom groups
• Manual testing locally by creating a custom asset group, adding members, and checking the endpoint/group management page

Screenshots (if appropriate):

Types of changes

• Chore (a change that does not modify the application functionality)
• 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 change)

Checklist:

• Documentation updates are needed, and have been made accordingly.
• I have added and/or updated tests to cover my changes.
• All new and existing tests passed.
• My changes include a database migration.

[urangel]

Good thinking filtering out substrings and thanks for adding a test!