Add NGF telemetry data for TLSRoute

[sarthyparty]

Proposed changes

Problem: NGF did not support telemetry for TLSRoute

Solution: I counted the number of TLSRoutes in the graph and added it to the telemetry data

Testing: Added unit tests for the updated code

Please focus on (optional): If you any specific areas where you would like reviewers to focus their attention or provide
specific feedback, add them here.

Closes #2286

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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.89%. Comparing base (8753459) to head (cb9195c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2359      +/-   ##
==========================================
+ Coverage   88.88%   88.89%   +0.01%     
==========================================
  Files         100      100              
  Lines        7509     7518       +9     
  Branches       50       50              
==========================================
+ Hits         6674     6683       +9     
  Misses        780      780              
  Partials       55       55              

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[ADubhlaoich]

Doc changes LGTM but as they are minor and the scope of the PR is largely code related, I am not giving an approval.

[bjee19]

Closing this PR and moving work to #2387.