Remove not programmed condition from Routes when nginx reload fails

[salonichf5]

Proposed changes

Cherry-pick for 3936

Closes #3936

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

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Fixed an issue where a failed configuration reload caused all HTTPRoutes to be marked as invalid (Accepted: false). This led to external-dns removing DNS records even though the configuration had been rolled back. Routes now retain their valid state during reload failures, preventing unnecessary DNS disruptions.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.88%. Comparing base (c68b52a) to head (8334405).
⚠️ Report is 1 commits behind head on release-2.1.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-2.1    #3938      +/-   ##
===============================================
+ Coverage        86.86%   86.88%   +0.01%     
===============================================
  Files              128      128              
  Lines            16029    16013      -16     
  Branches            62       62              
===============================================
- Hits             13924    13913      -11     
+ Misses            1936     1930       -6     
- Partials           169      170       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.