Use generated function signatures to communicate API and not manually crafted ones.

[adamdbrw]

• If there is a need for particular API, this is to be added to BehaviorContext.
• If documentation of existing method is not sufficient, address it by O3DE PR to fill in Tooltip and such fields.
• Generate API from selected subset of BehaviorContext. The most important part is for the solution to generalize and scale / extend well.
• Any extra python code should be a part of "developer toolbox" and not the ai-scene-generation or framework itself.