Update code to use new cache of idRefs to improve performance

From @WilcoFiers in regards to #2635:

I think there are a lot more places in axe-core that now we have a cache of ID references we could speed up. Probably best to open a tech debt issue for that one instead of pile it onto this PR. Here's a list though:

- checks
- aria-required-parent-evaluate
- explicit-evaluate
- hidden-explicit-label-evaluate
- multiple-labels
- duplicate-id-evaluate
- matches
- duplicate-id-active-matches
- duplicate-id-misc-matches
- scrollable-region-focusable-matches
- commons
- text.labelVirtual
- dom.findElmsInContext
- dom.isVisible (usemap lookup)

To make that easier, we can probably simplify by having something like a `idrefsReverse` function, that takes a node (with an ID) and an attribute and looks up any element references the ID with that attribute. I'll leave it up to you if you want to do that in this PR or another.

```js
const virtualControls = idrefsReverse(ancestorNode, 'aria-labelledby')
.map(control => getNodeFromTree(control));
```