Create aria label for partly correct answers

[kirsty-hames]

Subject of the enhancement

There is no aria label for partially correct question answers. See original issue raised. See existing labels below.

course.json

adapt_framework/src/course/en/course.json

Lines 46 to 47 in 917b161

	"answeredIncorrectly": "You answered incorrectly",
	"answeredCorrectly": "You answered correctly",

adapt_framework/src/course/en/course.json

Lines 62 to 63 in 917b161

	"incorrect": "Incorrect",
	"correct": "Correct",

buttonsView.js
https://github.com/adaptlearning/adapt-contrib-core/blob/4b8a99ab60704bb6d6993992ceae575b86a120c7/js/views/buttonsView.js#L188-L194

Expected behaviour

An aria label should exist for correct, partially correct and incorrect.