Adds middleware to ensure azd environment is always available

[wbreza]

Adds an EnvironmentMiddleware component that will validate and create azd environment as needed.

• [x] Removes interactive flow from environment container registration
• [x] Adds interactive environment registration to middleware after other checks fail
• [x] Run middleware before hooks middleware to ensure environment is ready
• [x] Simplifies hooks middleware to expect that environment is already available

Resolves #3920