[Grid] Default parameters for "default" grid action

[Zales0123]

Q	A
Branch?	1.0
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Related tickets
License	MIT

With previous implementation, it was required to pass parameters even if action route does not require any:

actions:
    main:
        destroy_ring:
            type: default
            options:
                link:
                    route: sylius_destroy_ring
                    parameters: {}

Now not passing paremeters does not result in twig error.

actions:
    main:
        destroy_ring:
            type: default
            options:
                link:
                    route: sylius_destroy_ring

[pamil]

Thanks, Mateusz 🎉