Improve TooltipTrigger's implementation

## Description

With its current implementation, the tooltip trigger requires that the trigger element be a class component, so as to pass it a reference. This should not be the case as the implementation of an element should not depend on whether it will be used as a tooltip trigger or not.

## Acceptance Criteria

- [ ] The TooltipTrigger can accept functional components as triggers.

Locate the TooltipTrigger implementation and any existing tests, then read how it obtains a reference from the trigger element. Done means a functional component can be used as the trigger without requiring the trigger itself to be a class component, while existing tooltip behavior remains intact.

Written by the indexing model from the issue text.