Get {{component}} working more robustly

[dfreeman]

This change very nearly gets the types for {{component}} working correctly.

For components with no type parameters, everything should work as expected. Any number of named args may be pre-bound, and they become optional when invoking the resulting component value.

For components with type parameters, if arguments not involved with the type parameters (or none at all) are pre-bound, any type params on the constructor are preserved in the resulting component value.

In other words, {{component AnimatedEach use=this.transition}} will result in a value with a signature like <T>(args: { items: Array<T> }) => AcceptsBlocks<{ default: [T, number] }>, so the type of items passed in will be reflected in the yielded block parameter.

The one place that requires care is if you wish to pre-bind an arg that fixes a type parameter on the component in question. To accomplish that, the type parameter itself needs to be fixed outside of template space, i.e.

const StringAnimatedEach = AnimatedEach as new () => AnimatedEach<string>;

hbs`
  {{yield (component StringAnimatedEach items=(array 1 2 3))}}
`;

This also ignores positional parameters, but to be honest I'm not actually 100% sure what the semantics for partial application are there anyway, and they're not supported by Glimmer components or by angle bracket invocation, so that feels like an ok loss.