[master] Add route removal functionality to RouteCollection

[TobMoeller]

This PR adds a remove() method to the RouteCollection and CompiledRouteCollection classes, enabling the removal of previously defined routes. This is particularly useful for overriding or removing routes defined by third-party packages.

Context

I had several cases where package-defined routes interfered with my application's use case or needed modification (changing middleware, etc.) without removing the package itself. This change enables such removal/overriding of routes defined by third-party packages.

Note

This is a breaking change as it adds a new method to the RouteCollectionInterface. I'm targeting the master branch but am open to targeting the 12.x branch if preferred.

Further Discussion

Is there interest in extending this functionality to make it easier to modify existing routes (e.g., changing middleware)? One idea would be to add functionality to define a new route and remove the existing one in a single operation.