chore: update Spinner and ProgressBar vr-tests to use PauseAnimation

[tomi-msft]

This PR is to update the vr-tests for ProgressBar and Spinner to use the proper test decorator, which pauses the animations rather than stopping them entirely.

• Fixes Spinner and ProgressBar use wrong vr-test decorator #27155

[fabricteam]

📊 Bundle size report

_{🤖 This report was generated against 8a242b14151adf4186df88f0fb234508db47ec06}

[size-auditor]

Asset size changes

Size Auditor did not detect a change in bundle size for any component!

Baseline commit: 8a242b14151adf4186df88f0fb234508db47ec06 (build)

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[sopranopillow]

Left some comments, once those are addressed, I think we're good to go.

Noticed you didn't add the styles like tooltip. Any reason why?

[behowell]

Added some comments about removing redundant tests, especially in Spinner.