Add "radiogroup should have an accessible name" as a best practice

### Product

axe-core

### Feature Description

Hi axe-core folks, I am opening a new issue in the vein of https://github.com/dequelabs/axe-core/issues/3256.

I would like to be alerted when elements with `role="radiogroup"` don't have a name that can be programmatically determined. I like [this suggestion](https://github.com/dequelabs/axe-core/issues/3256#issuecomment-999811865) of adding this as a best practice instead of a violation, given that WCAG and WAI-ARIA treat this requirement differently.

Even though a11ysupport.io marks this feature as only ["partially supported"](https://a11ysupport.io/tests/tech__aria__aria-required-radiogroup#assertion-aria-radiogroup_role-convey_name--jaws-chrome) by JAWS, drilling down into the specifics shows that JAWS consistently knows about the radiogroup's name. This broad support makes "radiogroup should have a name" a strong candidate for being represented somehow in `axe-core`.

If this sounds generally good, I can fill out a new rule template.

Start by reviewing the linked axe-core issue 3256 and its suggestion about treating this as a best practice. Then examine the new rule template mentioned in the issue. Done means reaching agreement on the rule's scope and adding a corresponding axe-core rule with the expected behavior covered.

Written by the indexing model from the issue text.