Provide API to attach an accessible name to PRC `ProgressBar`

[lesliecdubs]

Because of role: progressbar AXE will break if no accessible name is provided (i.e.aria-label or aria-labelledby). I added an aria-label to all the examples but wonder if I should enforce it at a prop level or throw an error like we do witht he children & progress

Originally posted by @kendallgassner in #3517 (comment)

[TylerJDev]

For additional context, I think @joshblack is working on potentially including this in our v37 release.

[lesliecdubs]

Discussed at today's PRC maintainer's sync:

• seems like throwing a warning for this is the right path, but that won't pass CI in dotcom
• investigate function overloading to see if we could use the new aria attributes to opt into the correct props

[github-actions]

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