Replace TODO route condition with an Accepted/False condition

[kate-osborn]

Proposed changes

Problem: When a route references a Gateway that is ignored, NGF adds the TODO condition: The condition for this has not been implemented yet: Gateway is ignored. This does not communicate to the user that the route is not accepted because the Gateway it references is ignored.

Solution: Change this condition to be Accepted/False/GatewayIgnored.

Testing: Verified that the condition is added to routes that reference an ignored Gateway.

Closes #2015

Checklist

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• 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

Release notes

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NONE

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.62%. Comparing base (efea992) to head (99ecaaa).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2228   +/-   ##
=======================================
  Coverage   87.62%   87.62%           
=======================================
  Files          96       96           
  Lines        6715     6715           
  Branches       50       50           
=======================================
  Hits         5884     5884           
  Misses        774      774           
  Partials       57       57           

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