entities: make Environment inherit EnvironmentBasic

What does this MR do?

Makes the Environment entity inherit from EnvironmentBasic

Are there points in the code the reviewer needs to double check?

No.

Why was this MR needed?

Just a code simplification.

What are the relevant issue numbers?

N/A

Screenshots (if relevant)

N/A

Does this MR meet the acceptance criteria?

• Documentation created/updated
• API support added
• Tests
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together