Rename `role-supports-aria-props` to `a11y-`

[khiga8]

Follow-up to https://github.com/github/eslint-plugin-github/pull/448

This PR renames the role-supports-aria-props rule to be prefixed with a11y- so that we can track it in our scorecard.

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[khiga8]

actions is down :(

waiting on that to merge.