[backport] Add role=region and aria-controls to the FacetFieldComponent

[jcoyne]

This follows the example of https://www.w3.org/WAI/ARIA/apg/patterns/accordion/examples/accordion/ for setting the aria properties for an accordion type widget

This is a backport of #3129

[jrochkind]

If this is a backport, can you link to the PR on main branch that it backports? I find that bookkeeping can be pretty invaluable at tracing what was done, especially in cases something works out unexpectedly or needs to be debugged.

If this is not feasible now, cause it wasn't necessarily one easily identifiable PR or some other reason, cool, just say so!

[jcoyne]

@jrochkind Sure. I've updated the description.