feat: Add lint rule for Spinner component

[Harsh-Modi278]

Add lint rule for Spinner component.
The Spinner component needs to have following attributes to be accessible:

• aria-live
• aria-label
  This information was inferred from component's implementation here.

Screenshot:

Examples of incorrect code for this rule:

<Spinner {...props} />

<Spinner 
    {...props} 
    aria-label="some text"
/>

<Spinner 
    {...props} 
    aria-live="polite"
/>

Examples of correct code for this rule:

<Spinner
    {...props} 
    aria-label="my screen reader text"
    aria-live="polite"
/>

[Harsh-Modi278]

@microsoft-github-policy-service agree company="Microsoft"

[aubreyquinn]

Excellent work, Harsh! Just two comments on there.