* Enable to set top_k for RouteLayer

* Add top_k unit test for RouteLayer

* Added support for setting different aggregation method for HybridRL

* Add unit test to verify that aggregation works

* Add support for setting aggregation in RouteLayer

* Fix bug where agg method not used in RL

* Add tests for agg

* Linted code

* Updated codecov file

* Change aggregation method names to lower case

---------

Co-authored-by: James Briggs <35938317+jamescalam@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

Co-authored-by: Ismail Ashraq <59014721+ashraq1455@users.noreply.github.com>

To avoid this:

Error: COMMIT: PRs with a single commit require the commit message to conform to the conventional commit spec.

Simulation of static routes from dynamic routes now handled in __call__ as this avoids a situation where we have subtly different logic in __call__ compared to _simulate_static_route_selection.

Introduced _simulate_static_route_selection which simulates static routes, even when dynamic routes are being evaluated in _vec_evaluate().

This was necessary as dynamic routes use text inputs, but we use vector inputs when evaluating for increased performance.

Also refactored a little to avoid code duplication between _simulate_static_route_selection() and __call__().