refactor: deprecate enableAnonymousUsers

[dblythy]

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New Pull Request Checklist

• [x] I am not disclosing a vulnerability.
• [x] I am creating this PR in reference to an issue.

Issue Description

enableAnonymousUsers should default to false.

Related issue: #7923

Approach

Adds planned depreciation

TODOs before merging

• [x] A changelog entry is created automatically using the pull request title (do not manually add a changelog entry)

[parse-github-assistant[bot]]

Thanks for opening this pull request!

• ❌ Please link an issue that describes the reason for this pull request, otherwise your pull request will be closed. Make sure to write it as Closes: #123 in the PR description, so I can recognize it.

[codecov[bot]]

Codecov Report

Base: 94.11% // Head: 94.11% // Increases project coverage by +0.00% :tada:

Coverage data is based on head (6d6acb2) compared to base (b10182f). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##            alpha    #7924   +/-   ##
=======================================
  Coverage   94.11%   94.11%           
=======================================
  Files         182      182           
  Lines       13621    13623    +2     
=======================================
+ Hits        12819    12821    +2     
  Misses        802      802           

Impacted Files	Coverage Δ
src/Security/CheckGroups/CheckGroupServerConfig.js	96.00% <100.00%> (+0.34%)	:arrow_up:
src/RestWrite.js	94.30% <0.00%> (ø)

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[parse-github-assistant[bot]]

I will reformat the title to use the proper commit message syntax.