[EuiBetaBadge] Should also behave as a link

[elizabetdev]

The EuiBetaBadge doesn't allow links.

For instance, in cases, we have a disabled EuiCard with a beta badge the only interaction we can add is to trigger a tooltip. So if we want to add a link it's impossible.

This issue was raised on elastic/kibana#79627, where a workaround was introduced:

Notice that there is another issue with this workaround:

• On hover the EuiBetaBadge only changes the cursor. I think we can provide better hover states.

[elizabetdev]

The PR #4798 fixed this issue. 🎉