Assess Impact on Docs of Config File Management Env Variables

Identify documentation impact and requirements to support the introduction of this change

PRD: https://docs.google.com/document/d/1phWR5FmFQ0CgzZSOdaYSW-TnCGj-COteJ23gcfq82bc/edit?usp=sharing

Dev Tickets

• https://issues.couchbase.com/browse/CBG-1150 

Docs Tickets:

• Prep — https://issues.couchbase.com/browse/DOC-8178 
• Epic — https://issues.couchbase.com/browse/DOC-7720

Outputs:

• Plan for any preparatory infrastructure changes
• Plan for new topics and-or amended topics; raise Jira tickets as necessary