Use generalized grouped properties in places where it makes sense

We need to use generalized grouped properties to get rid of the custom parser in QQuickPropertyChanges. See QTBUG-95117. However, other elements might benefit greatly from the more concise syntax they offer:

• Binding: You could set multiple bindings on different objects in one element. Also you wouldn't need to string-type the property.
• Connections: You could have a type safe way to specify the signals
• NumberAnimation: No string-typing the property
• ParentChange: Could apply changes to multiple elements at once
• others?