Send only IDs for custom list manual update entries. (PP-2050)

[tdilauro]

Description

• Send only ids for custom list manual update items in the "entries" and "deletedEntries" properties, rather than including all the metadata associated with the them.
• Exclude items that are already members of the list from the updated "entries" payload.

Motivation and Context

• Payloads included many unnecessary properties for each list item entry, when only the id is needed for additions and deletions.
• The update payload included all loaded current entries, even those that were already members of the list; so, if the use loaded many pages of the list, many unneeded members could be included in the request. This would lead to:
• Larger requests.
• Unnecessary processing.

[Jira PP-2059]

How Has This Been Tested?

• Manually tested multiple scenarios locally.
• Updated tests.
• All tests pass locally.
• CI tests for associated branch pass.

Checklist:

• [N/A - I have updated the documentation accordingly.
• All new and existing tests passed.