Investigate reduced motion behavior for Progress components

[tomi-msft]

Currently the behavior for progress components in fluentui when reduced-motion is active is to have the animation execute 3 times then stop, and have a label prop with Loading... or some indication of buffering. There are a few scenarios that this approach would not be feasible.

For example, using the determinate Progress. When progression towards a 100% completion is required, stopping the bar animation is counterintuitive to the usage of Progress.

This issue is to track research being done to come up with a strategy for how progress components should behave when reduced-motion is active

[tomi-msft]

Tracking with #25561 and #25563