Fix port binding with reduced privileges

[sjberman]

Problem: The nginx deployment was using extra privileges in order to bind to privileged ports (<1024). This included allowPrivilegeEscalation and NET_BIND_SERVICE. Sometimes this could cause issues in some secure environments.

Solution: Remove these extra privileges and take advantage of sysctls to lower the allowed port range for the pod its defined on.

Testing: Verified that everything still works, including in OpenShift.

Closes #3567

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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please add a brief note that summarizes the change.

Fix port binding with reduced privileges.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.86%. Comparing base (a523d21) to head (d461ded).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3574      +/-   ##
==========================================
- Coverage   86.89%   86.86%   -0.04%     
==========================================
  Files         127      127              
  Lines       15220    15226       +6     
  Branches       62       62              
==========================================
  Hits        13226    13226              
- Misses       1843     1848       +5     
- Partials      151      152       +1     

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