Document Distributed AIO

[alexfornuto]

Update docs where relevant to document the preferred deployment strategy:

Testing and Homelab: Single all-in-one.
Most Production Cases: Distributed all in one with redundant databroker storage
Special Use Case: Distributed Service Mode.

Relevant docs (update as needed)

• https://www.pomerium.com/docs/production/production-deployment
• https://www.pomerium.com/docs/overview/architecture