Bug: dbc.Tabs not keyboard accessible

[araichev]

This issue relates to disability access, and echoes the Dash issue discussed here.
Specifically, one can't switch between dbc.Tabs using the keyboard's <tab> and <space> keys.
You can test this on your tabs demo page, for example.

[wannadream]

Based on the implementation, NavLink focus is managed according to the ARIA authoring practices for tabs.
https://react-bootstrap.netlify.app/docs/components/navs#nav