DX: Django debug toolbar

[RadoRado]

The general idea is the following:

1. We show the toolbar if we have it installed & we have it configured to be shown.
   • This opens up the option to move the dependency as a local one, if one chooses to do so.
2. This function acts as the single source of truth of that.
   • No additional checks elsewhere are required.

This means we can have the following options possible:

• Show on a production environments.
• Exclude the entire dependency from production environments.
• Have the flexibility to control the debug toolbar via a single Django setting.

Additionally, we don't want to deal with the INTERNAL_IPS thing.