Aria setLabeledBy and setDescribedBy enhancements

[Dafnik]

Aria described by and aria labeled by allows a list of ids as value

• https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-describedby#values
• https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-labelledby#values

Adds following helper methods to IHCAttrContainer

• setAriaDescribedBy (@Nonnull final IHCElement <?> aDescribedBy)
• setAriaDescribedBy(@Nonnull final ICommonsCollection<IHCElement<?>> aDescribedByMultiple)
• setAriaLabeledBy(@Nonnull final ICommonsCollection<IHCElement<?>> aLabeledByMultiple)