Internal issue 3161 - Add support for tooltips on non-icon toggle buttons

NOTE: Screenshots available internally

h3. Summary

Add the ability to display tooltips on any toggle button. This would match the existing behaviour of regular buttons.

h3. 💬 Description

{{IcButton}} s have the options {{title}} and {{tooltipPlacement}} to add an {{IcTooltip}} to the button ([see ICDS website example|https://design.sis.gov.uk/components/inputs/button/code/#tooltip] and attachment 1). {{IcToggleButton}} s have these props but they don’t create an {{IcTooltip}}, instead using the browser's built-in tooltips (attachment 2). Trying to manually add an {{IcTooltip}} can break styling inherited from an {{IcToggleButtonGroup}} (attachment 3).

h3. 💰 Use value

Behaviour already exists for standard buttons. Will be useful in cases where new functionality won’t be immediately clear to users used to legacy platforms; tooltip helps explain function of button.

h3. 📝 Acceptance Criteria

Given a toggle button

When a user hovers over it with their mouse

Then a tooltip appears

h3. 🚨 Urgency (low, medium or high)

Medium

Start by locating the IcToggleButton, IcToggleButtonGroup, IcButton, and IcTooltip components, then compare how IcButton creates tooltips from its title and tooltipPlacement props. The work is done when hovering a toggle button displays the tooltip without breaking IcToggleButtonGroup styling, as described by the acceptance criterion.