Migrate silo views to generic view

[ybekdemir]

Current behavior

Currently we are using separated view functions for silo detail, silo edit, list silo and delete silo pages and we have similar permissions check for each other. When we need to update permissions, we have to update each other. Also, it's not readable.

Current view functions.
def list_silos(request):
def edit_silo(request, id):
def silo_detail(request, silo_id):
def list_silos(request):

Expected behavior

We should use generic views for list, detail and silo edit pages. Therefore, we can use same permission class for all of them.