[labs/gen-wrapper-angular] Improved @Input types for Angular wrappers

Nobody has claimed this yet.

### Should this be an RFC?

- [X] This is not a substantial change

### Which package is this a feature request for?

Other/unknown (please mention in description)

### Description

The current Angular wrapper generator (`labs/gen-wrapper-angular`) cannot get complex types for `@Input` properties. There is an easy fix for this:

Current:

```js
${Array.from(reactiveProperties.entries()).map(
([propertyName, property]) => javascript`
@Input()
set ${propertyName}(v: ${property.type?.text ?? 'any'}) {
this._ngZone.runOutsideAngular(() => (this._el.${propertyName} = v));
}
```

Proposed:
```js
${Array.from(reactiveProperties.entries()).map(
([propertyName, property]) => javascript`
@Input()
set ${propertyName}(v: ${name}Element[${propertyName}]) {
this._ngZone.runOutsideAngular(() => (this._el.${propertyName} = v));
}
```

Notice the change: `${name}Element[${propertyName}]`

Something similar can be done for events as well. But in this issue I think we can simply fix the Input properties because events could change substantially: [Declarative event emitters #3277](https://github.com/lit/lit/issues/3277).

### Alternatives and Workarounds

Currently we maintain our own wrapper generation code in-house.

Start at the labs/gen-wrapper-angular generator and inspect how it builds @Input setter types from reactiveProperties. Update the generated type expression so complex property types come from the corresponding element property, then verify generated Angular wrappers expose the intended @Input types without changing event generation.

Written by the indexing model from the issue text.