Rename slug/aiLabel prop to Decorator

[sangeethababu9223]

@carbon/react is renaming the aiLabel prop to decorator, so you can now pass not just the AILabel component but also other components like Tooltip to it.
Refer this issue for details: #17921.
With this change, we’ll need to update aiLabel to decorator in our code too.

Components to rename aiLabel to decorator

• Rename aiLabel prop to decorator in ExpressiveCard / ProductiveCard #6452
• Rename aiLabel prop to decorator in SidePanel #6454
• Rename aiLabel prop to decorator in Tearsheet #6455
• Rename slug prop to decorator in CreateTearsheet #6456
• Datagrid?