Configure additional fields for cloud providers

[grolu]

What would you like to be added:
With PR #1436 we added support for adding cloud providers via dashboard configuration.
However if a cloud provider requires additional input on the cluster creation page, it is currently not possible to configure additional fields.

***Implementation Plan

• Merge [DRAFT] Add cloud providers via configuration #1553
• Upgrade to Vue / Vuetify 3
• Refactor NewShootInfrastructureDetails component to store staging resource Improve Frontend Component Quality #975
• add generic component for additional configurable fields

As first step support only plain input fields or maybe simple dropdowns

Why is this needed:
Expose require or additional configuration to avoid complicated yaml editing.