Adjust kubernetes permissions and provide different examples configs

[dd-gplassard]

What this PR does / why we need it:

Defines several exemples of config with different privileges

Special notes for your reviewer:

Checklist

• [x] Chart Version bumped
• [x] CHANGELOG.md has been updated

[dd-gplassard]

Closed in favor of https://github.com/DataDog/helm-charts/pull/1518