add basic scale to zero notebook

[dulayjm]

Issue #, if available:

Description of changes:

Core Issue

The “scale-to-zero” autoscaling ManagedInstanceScaling introduced in the AWS blog does not work on endpoint models. Rather, it integrates only with inference components which are a new and separate abstraction from the rest of the SageMaker SDK. This leads to:

• No integration with traditional SageMaker inference endpoints
• No automatic integration with CloudWatch
• No automatic integration with auto scaling
• Broken integration with the AWS SageMaker Console.

Solution Overview

• Create an endpoint config and endpoint without a model
• Create a model without deploying to endpoint
• Create instance component from the model
• Attach the instance component to the endpoint
• Manually configure CloudWatch and autoscaling

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