[IMP] Enhance the MONAI Bundle inference operator to support the enhanced MONAI Bundle

[MMelQin]

Is your enhancement request related to a problem? Please describe.
MONAI Bundle has been enhanced in MONAI v1.3 with improved/additional Pythonic API. App SDK's built-in MONAI Bundle Inference Operator should be enhanced accordingly.

Also, expand the support of "actions" beyond pre-processing, post-processing, and infer, if appropriate.

Describe the solution you'd like
See how the new MONAI Bundle API in MONAI core can be used.

Describe alternatives you've considered
N/A

Additional context
Limitation of the MONAI Bundle is known as it was designed to support the most common inference pipelines, with simple pre-processing, infer, and post-processing. MONAI Bundle has evolved to support custom attributes/actions.