Torch dependency in sagameker-core to be made optional

[sateeshmannar]

PySDK Version

• PySDK V2 (2.x)
• PySDK V3 (3.x)

Describe the bug
Can torch dependency be made optional? Torch feature is NOT used by all users and adding it as a dependency brings in a lot of additional transitive dependencies resulting in any custom image built w/sagemaker-core to be bloated. Can this be made optional?

To reproduce
pip install sagemaker-core==2.3.0

Expected behavior
Sagemaker-core install should not install torch by default

Screenshots or logs
NA

System information
A description of your system. Please provide:

• SageMaker Python SDK version: 3.3.0
• Framework name (eg. PyTorch) or algorithm (eg. KMeans): Torch
• Framework version: NA
• Python version: 3.1.13
• CPU or GPU: CPU
• Custom Docker image (Y/N): Y

Additional context
We are trying to keep our custom images as lean as possible and avoid includng packages that are not used in our env.