Form Support: Accessibility issue for required inputs

[elenastoyanovaa]

Bug Description

When a required input field component is used in a form an accessibility issue is present related to the additionally rendered input field, used to achieve form support.

Steps to Reproduce

1. Go to 'this sample'
2. Use AXE of Access Assistant extentions and run a general test on the whole page
3. An error stating that an input field does not have an accessible name is present.

The issue is introduces with this PR: #5133 and was not present before, because the additional input had a role="hidden" and was ignored for accessibility. Now this element is exposed to the accessibility tree and as an input field it is required to have an accessible name. As this input is not used by the component users, we should hide it from the accessibility tree by adding aria-hidden="true"