ASPIRE Yarp AuthorizationPolicy

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

Please consider adding the ability to configure the YarpRoute AuthorizationPolicy similiar to the WithTransform extensions.

### Describe the solution you'd like

```
var applicationProxy = distributedApplicationBuilder.AddYarp(name: "yarp")
.WithConfiguration((yarp) =>
{
yarp.AddRoute("/api/{**catch-all}", messageGenerator)
.WithMatchMethods("GET", "POST", "PUT", "PATCH")
.WithTransformPathRemovePrefix("/api")
.WithTransformPathPrefix( "/v1")
.WithTransformRequestHeader( "X-Forwarded-Host" , "gateway.example.com")
.WithTransformResponseHeader("X-Powered-By" , "YARP")

**.WithAuthorizationPolicy("must-be-auth");**

});

```

### Additional context

other route setting could follow the same pattern and may need to be exposed.

Start by tracing AddYarp, WithConfiguration, AddRoute, and the existing WithTransform extensions to find how route settings are exposed. Check the related tests, if present, and define done as allowing a YARP route to configure an authorization policy through WithAuthorizationPolicy, with coverage for the configured policy.

Written by the indexing model from the issue text.