Update training config in CLI to reflect new options (8B support)

[ktam3]

Goal:

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Update training config in CLI to reflect new options

Acceptance Criteria:

The Acceptance Criteria provides a definition of scope and the expected outcomes - from a users point of view - defines the value proposition

• Update description of is_padding_free flag
• used_dolomite flag is introduced
• Both need to be properly connected to training library and appropriately described in functionality.

[junzzhu]

I wonder if the latest granite-3.0 is within the consideration, as there is a new model - https://huggingface.co/ibm-granite/granite-3.0-8b-base, which has different architecture/model_type from the previous granite-8b.

[ktam3]

This is related to the downstream configs Charlie is currently working on