Table - expandable tree animation support

[kmcfaul]

patternfly/patternfly#7522

• Needs an opt-in flag for animations (or reusing other Table animation opt-in prop combined with isTreeTable).
• Add this flag to the TableContext.
• Reference the context in TreeRowWrapper & add modifier classes (expandable, nested, any others from core PR) based on its presence + aria-level/isExpanded in TreeRowWrapper.

[github-actions]

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