[Example Request] Example showing how to utilise tree collection metrics captured from XGBoost estimator object

**Describe the use case example you want to see**
Example showing how to utilise tree collection metrics captured from XGBoost estimator object

**How would this example be used? Please describe.**
Use XGBoost estimator, collect tree metrics, from debugger hook and visualize the tree metrics in an interpretable manner

**Describe which SageMaker services are involved**
Sagemaker Debugger

**Describe what other services (other than SageMaker) are involved***
NA

Start by locating the SageMaker Debugger hook and the XGBoost estimator example entry point. Determine how tree collection metrics are captured, then document an interpretable visualization workflow using those metrics; done means the example runs and shows the collected tree metrics.

Written by the indexing model from the issue text.