Add process namespace sharing for ingress controller

[panzouh]

Proposed changes

The changes allow to configure process namespace sharing for a pod.

Solves : #4558

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

All modified and coverable lines are covered by tests ✅

Comparison is base (dbc0ece) 51.96% compared to head (9d05fdd) 51.99%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4559      +/-   ##
==========================================
+ Coverage   51.96%   51.99%   +0.02%     
==========================================
  Files          59       59              
  Lines       16960    16960              
==========================================
+ Hits         8814     8818       +4     
+ Misses       7849     7847       -2     
+ Partials      297      295       -2     

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[shaun-nx]

@panzouh there are a few things missing from this PR.

1. Docs will need to be updated for this new value. You can add a new entry for this in charts/nginx-ingress/README.md. This is to ensure we provide a breakdown of what the setting does.
2. The values.json.schema file in charts/nginx-ingress/ will need to be updated as well.

[panzouh]

@panzouh there are a few things missing from this PR.

1. Docs will need to be updated for this new value. You can add a new entry for this in charts/nginx-ingress/README.md. This is to ensure we provide a breakdown of what the setting does.
2. The values.json.schema file in charts/nginx-ingress/ will need to be updated as well.

Of course, given the fact that these modifications are not described in the contribute guide nor in the precommit config meaning that i should do it manually right ?

If it is indeed the case updated it on 76074a2b3d98332f7b9ca30304097cd6e8175445

[lucacome]

@panzouh LGTM, but seems like you need to rebase your branch.

[shaun-nx]

HI @panzouh was having some problems with the pipeline. I'm re-running the failed jobs now.

[shaun-nx]

Thanks for adding this @panzouh ! Keep us informed on #4558 is this setting helps you!