Fix udp/http listener validation logic

[j1m-ryan]

Proposed changes

Fixes #6408

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

Attention: Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 53.21%. Comparing base (166b954) to head (d91e730).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...is/configuration/validation/globalconfiguration.go	85.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6406   +/-   ##
=======================================
  Coverage   53.20%   53.21%           
=======================================
  Files          85       85           
  Lines       16002    16009    +7     
=======================================
+ Hits         8514     8519    +5     
- Misses       7081     7082    +1     
- Partials      407      408    +1     

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