Configure collection subscription setting visibility via environment. (PP-2064)

[tdilauro]

Description

Control the visibility of the collection subscription configuration settings via an environment variable (PALACE_ADMINUI_HIDE_SUBSCRIPTION_CONFIG).

TODO: Still needs some tests.

Motivation and Context

Prevent accidental configuration of collection subscriptions for some CM instances while that feature is being built out.

[Jira PP-2064]

How Has This Been Tested?

TODO: Still need to add some tests.

Checklist

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.12%. Comparing base (83e1fcb) to head (76bd8a3).

Additional details and impacted files

@@                              Coverage Diff                              @@
##           feature/collection-active-date-configuration    #2265   +/-   ##
=============================================================================
  Coverage                                         91.11%   91.12%           
=============================================================================
  Files                                               363      363           
  Lines                                             41303    41313   +10     
  Branches                                           8843     8845    +2     
=============================================================================
+ Hits                                              37635    37645   +10     
  Misses                                             2406     2406           
  Partials                                           1262     1262           

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