[Blazor] Enable creating dynamic routes

### 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.

This is not a problem in Blazor, but a feature request.

**Scenario**
A Blazor component is created in a Razor Class Library, with its own route:

@page "/parameters"

This external component is imported in a Blazor app with AdditionalAssemblies parameter:

The goal is that the Blazor app can choose a different route to this external component (from config file for example).

Currently routing is static on Blazor applications. The routes get defined on pages that are stamped as attributes on the component types and attribute types must be compile time constants.

This prevents creating a custom route for this external component from the main Blazor app.

### Describe the solution you'd like

Make routes dynamic so that this kind of scenario is possible.

### Additional context

_No response_