STCOM-1285 Migrate way from findDOMNode in stripes-react-hotkeys

[JohnC-80]

The way to migrate away from this deprecated fallback is to use a ref/supply a known DOM element.

HotKeys has always had the attach prop that accepts a ref to the scoped element.

If an element isn't provided, the findDOMNode will still be called and the error will be thrown.

If the element isn't provided, the Hotkeys component will redraw so that it can pass 'findDOMNode' through to FocusTrap.

This change removes the unavoidable call to findDOMNode within FocusTrap, depending on an element prop to be passed in from HotKeys.

Anticipated Migration:

<Hotkeys>
  <input />
</Hotkeys>

to

const inputRef = useRef(null);
<Hotkeys attach={inputRef}>
  <input ref={inputRef}/>
</Hotkeys>

[github-actions]

Bigtest Unit Test Results

0 tests  ±0   0 ✅ ±0   0s ⏱️ ±0s
0 suites ±0   0 💤 ±0 
0 files   ±0   0 ❌ ±0 

Results for commit 76b0f15. ± Comparison against base commit 6b07821.

♻️ This comment has been updated with latest results.

[ncovercash]

I like the idea — let me know when it's ready for review!

[sonarcloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)
B Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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