fix --enternal-service flag when using serviceNameOverride

[timnee]

Proposed changes

Add a template helper for nginx-ingress.controller.service.name to fix the --external-service flag on deployement/daemonset. This fixes a bug introduced in PR #3802 which resulted in ingress status to be empty

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

[codecov]

Codecov Report

Merging #3933 (482a602) into main (268b00b) will decrease coverage by 0.02%.
The diff coverage is n/a.

❗ Current head 482a602 differs from pull request most recent head 942a5f2. Consider uploading reports for the commit 942a5f2 to get more accurate results

@@            Coverage Diff             @@
##             main    #3933      +/-   ##
==========================================
- Coverage   51.81%   51.79%   -0.02%     
==========================================
  Files          59       59              
  Lines       16697    16697              
==========================================
- Hits         8651     8648       -3     
- Misses       7747     7749       +2     
- Partials      299      300       +1     

see 1 file with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[vepatel]

verified