Reorder values and their documentation

[LeoColomb]

The goal of this PR is to give the values.yaml a sectioned structure to ease its reading and its maintenance.
The following objectives are in mind:

• Add standard global parameters (used across more and more charts)
• Document all values as much as possible
• Gives all values a formatted comment
  • It follows Bitnami's standard
  • That will help to auto-generate docs as a next step
    • With something that can use on tools like https://artifacthub.io/
    • Eventually get rid of the cumbersome to maintain README's list
• Regroup parameters per scope
  • Global
  • Common
  • NetBox Image
  • NetBox Configuration
  • Deployment
  • Traffic Exposure
  • Metrics
  • Databases
  • Autoscaling
  • Volume permissions / Init
  • Test
  • Housekeeping
  • Worker

Note

Despite the high number of line changed, very few values (~10) are renamed.
The chart remains mostly the same.

Note

install --upgrade test is failing since one or more values have been renamed but the chart not bumped to the next major version.