Use tooltips over descriptions in connector templates

[nikku]

What should we do?

We gradually move over our core properties panel UX from descriptions to rich tooltips, cf. camunda/example-data-properties-provider#18, do the same for OOTB connector templates.

Why should we do it?

Tooltips unclutter the UI and allow you to add rich assistance for those that need it (only). To ensure a consistent UX we want to use them in connectors, too.

[nikku]

CC @crobbins215 @YanaSegal

[sbuettner]

@nikku Should we move the description into the tooltip property? Or should we keep both and if a tooltip is present the UI will render only the tooltip and not the description?

[sbuettner]

Can be done as part of: #3089

[YanaSegal]

@nikku @johnBgood, This issue sits in ready since April. Do you need any design support here?