Use non-deprecated reindex.remote.allowlist setting

[andrross]

Description

Test fix to replace usage of a deprecated setting

Check List

• New functionality includes testing
• New functionality has been documented
• New Roles/Permissions have a corresponding security dashboards plugin PR
• API changes companion pull request created
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.46%. Comparing base (ca5eb23) to head (2d18c8a).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5068      +/-   ##
==========================================
- Coverage   71.47%   71.46%   -0.02%     
==========================================
  Files         336      336              
  Lines       22625    22625              
  Branches     3601     3601              
==========================================
- Hits        16171    16168       -3     
- Misses       4654     4658       +4     
+ Partials     1800     1799       -1     

see 3 files with indirect coverage changes