chore: add script to force delete a namespace

[lemaitre-aneo]

Motivation

Sometimes, when destruction goes wrong, the kubernetes namespace might end up being undeletable by conventional means. In those cases, even kubectl delete namespace NAME --force --grace-period=0 does nothing.

Description

Add a script to remove all the finalizers of the namespace to tell kubernetes that the namespace has now been finalized.

Impact

This script should be used only as a last resort as it might leave resources alive.

Checklist

• My code adheres to the coding and style guidelines of the project.
• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• I have thoroughly tested my modifications and added tests when necessary.
• Tests pass locally and in the CI.
• I have assessed the performance impact of my modifications.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud