Rename collection library associations. (PP-1875)

[tdilauro]

Description

• Rename some collection/library association attributes.
• Still to do: Some renaming from the library side.

Motivation and Context

With the introduction of the subscription concept, it would be helpful to clearly make the distinction between (1) all configured associations between Collections and Librarys and (2) those that are currently in effect or active.

This PR separates out some of the renaming of the existing association attributes to both

• simplify the review process, and
• reduce the time that a PR with such sweeping changes is in flight, hopefully reducing conflicts amongst PRs.

[Jira PP-1875]

How Has This Been Tested?

• Tests pass locally.
• CI tests for associated branch pass.

Checklist

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

[jonathangreen]

This looks good generally, but I put a comment about renaming the association_proxy on IntegrationConfiguration that I'd like to discuss before it goes in.

[codecov]

Codecov Report

Attention: Patch coverage is 96.87500% with 1 line in your changes missing coverage. Please review.

Project coverage is 91.09%. Comparing base (6f25265) to head (15cafd5).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/palace/manager/scripts/configuration.py	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2195      +/-   ##
==========================================
+ Coverage   91.08%   91.09%   +0.01%     
==========================================
  Files         363      363              
  Lines       41221    41248      +27     
  Branches     8843     8839       -4     
==========================================
+ Hits        37545    37575      +30     
+ Misses       2407     2406       -1     
+ Partials     1269     1267       -2     

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