Remove aria labels from radio buttons.

[drgrice1]

This was requested by @glarose and the accessibility experts at the University of Michigan. Having aria labels on these radio buttons that also have labels causes issues with screen readers. It results in the aria label being read and not the actual label.

It seems to me that this is correct in any case. An input should not have both a label and an aria label. Those clearly conflict.

Also improve the aria labels for the answers inside the radio buttons for a RadioMultiAnswer. For this the parserRadioMultiAnswer.pl macro has its own generate_aria_label method for now as the generate_aria_label method in PGbasicmacros.pl does not work well for the parserRadioMultiAnswer.pl macro.

In addition add some missing maketext calls on aria labels, and take advantage that maketext substitutions now work in PG.

We need to find a better way to create aria labels in general. The generate_aria_label method in PGbasicmacros.pl is neither versatile nor extensible. Attempting to construct meaningful labels from PG's answer name was never a good idea to begin with. By the way, since the aria label is currently constructed from the answer name, this is yet another reason to strongly discourage (actually flat out forbid) problem authors from using hard coded made up answer names in problems instead of calling NEW_ANS_NAME to obtain one.

[dlglin]

This may not be the best place for a discussion about hard-coded answer names, but we should be looking at deprecating this. Is it possible to reliably detect when an answer name wasn't generated with NEW_ANS_NAME? If so, can we add a warning for instructors in the upcoming release letting them know that this is no longer supported. Then in a subsequent release we can deprecate it.

[drgrice1]

All answers that come from NEW_ANS_NAME will have the PGcore ANSWER_PREFIX which is defined to be AnSwEr. So at the very least, any answer that doesn't have that certainly didn't come from NEW_ANS_NAME. The converse would not necessarily be true though. Although all of the cases where answer names should be used but are and are using a hard-coded answer name that I have seen don't use something containing AnSwEr.

[pstaabp]

I didn't test it. I think having @glarose test may be the way to go.

I see for radio buttons, that the aria-label is removed and seems that it is added for checkboxes though.