Fix NFR upgrade tests with NGINX Plus

[sjberman]

Problem: When first deploying NGF edge version in the upgrade tests, NGINX Plus was not properly enabled. Also, once deployed, the upgraded version did not use the proper usage endpoint.

Solution: Ensure that the upgrade tests deploy the edge version of the NGINX Plus image, and set the proper usage endpoint once upgraded.

Testing: Upgrade tests run with Plus and now pass without errors.

Closes #2966

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[sjberman]

Wait, I messed part of this up. This will deploy edge and upgrade, not the last release.

un-approving

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.93%. Comparing base (8ac863e) to head (69f0ab2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2967   +/-   ##
=======================================
  Coverage   89.93%   89.93%           
=======================================
  Files         111      111           
  Lines       11423    11423           
  Branches       50       50           
=======================================
  Hits        10273    10273           
  Misses       1089     1089           
  Partials       61       61           

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