Fix HyperparameterTuner to include ModelTrainer internal channels #222

Job	Run time
collab-check	3s
wait-for-approval	4s
detect-changes	10s
codestyle-doc-tests (sagemaker-serve)	8m 28s
unit-tests (sagemaker-serve)	46m 20s
unit-tests (sagemaker-train)	29m 55s
codestyle-doc-tests (sagemaker-train)	8m 0s
integ-tests (sagemaker-train)	53m 7s
integ-tests (sagemaker-serve)	34m 51s
integ-tests (sagemaker-mlops)	23m 56s
unit-tests (sagemaker-mlops)	32m 25s
codestyle-doc-tests (sagemaker-mlops)	7m 41s
collab-check	3s
wait-for-approval	4s
integ-tests (sagemaker-mlops)	21m 21s
detect-changes	10s
codestyle-doc-tests (sagemaker-train)	8m 0s
unit-tests (sagemaker-mlops)	32m 25s
codestyle-doc-tests (sagemaker-serve)	8m 28s
integ-tests (sagemaker-train)	53m 7s
unit-tests (sagemaker-serve)	46m 20s
integ-tests (sagemaker-serve)	34m 51s
codestyle-doc-tests (sagemaker-mlops)	7m 41s
unit-tests (sagemaker-train)	29m 55s
collab-check	3s
wait-for-approval	4s
integ-tests (sagemaker-mlops)	22m 49s
detect-changes	10s
codestyle-doc-tests (sagemaker-serve)	8m 28s
codestyle-doc-tests (sagemaker-mlops)	7m 41s
unit-tests (sagemaker-mlops)	32m 25s
integ-tests (sagemaker-train)	53m 7s
integ-tests (sagemaker-serve)	34m 51s
codestyle-doc-tests (sagemaker-train)	8m 0s
unit-tests (sagemaker-train)	29m 55s
unit-tests (sagemaker-serve)	46m 20s
	12h 11m 18s

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