feat: support transform ami version in Amazon SageMaker transform jobs

[ZhengfeiJi]

Issue #5204

Description of changes:

Added support for the TransformAmiVersion parameter in the Transformer class, allowing users to specify a preconfigured Amazon Machine Image (AMI) when launching transform jobs.

Usage:

  transformer = Transformer(..., transform_ami_version="al2-ami-sagemaker-batch-gpu-535")
  transformer.transform(data=...)

Code Path:

transform() 
    → _get_transform_args()
      → _load_config()
        → _prepare_resource_config(self.transform_ami_version)  ← Uses instance attribute
    → _get_transform_request(resource_config=...)
      → TransformResources(**resource_config)  ← Contains transform_ami_version

Tests:
Unit tests for the new param are added

Ref:
https://docs.aws.amazon.com/sagemaker/latest/APIReference/API_TransformResources.html

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