Bug: does not correctly handle the option to have elements with role="group" in a listbox context ARIA 1.2

[Zidious]

Ref: dequelabs/axe-core-npm#313

Note: I was able to replicate the issue within axe-core's playground.html and cli

[straker]

Confirmed that group inside listbox works in our supported screen readers and browsers. opened #3195

cc @spectranaut

[padmavemulapati]

Validated with the latest develop-branch code base of axe-core,
seeing the bug fix, for listbox content with role="group"
Now the option to use role="group" in a listbox context, but limit's the children of the group element to elements with role option. So that it should not show the failures for aria-required-children or aria-required-parent in the testpage
'https://w3c.github.io/aria-practices/examples/listbox/listbox-grouped.html'