feat(tooltip): allow providing a global matTooltipClass

[Harpush]

Feature Description

Right now the tooltip class can be set on per tooltip basis. I want to declare the class name globally once and it will apply to all tooltips (hence global options token).

Use Case

We have in our app a certain tooltip class we pass to hundreds of tooltips. If we could provide the options on the route (or in root) that needs the specific tooltip class with that class we shouldn't have to remember to pass the class name in each and every tooltip usage.