Add warning for DE and GA scenario

[lisazeyen]

Affected Component/Workflow

• I have labeled this feature with the affected component(s) using GitHub labels (e.g., SB, CBA, documentation, etc.).

Overview

PR should be against master

• add warning to documentation
• add logger warning when DE / GA is selected
• remove DE / GA weather scenarios from scenarios yaml file

Scope & Key Deliverables

No response

Implementation Tasks

No response