Adjust assembly loading behavior to not rely on core scanning #1379
Description
Describe the suggested improvement
In v11, we load the assemblies that contain sagas, and if scanning is on, we also include all the scanned assemblies. This means that when scanning is off, only assemblies with sagas are loaded. Since users can explicitly add assemblies as needed via the NHibernate APIs, there is no real need to load all assemblies, and we should align behavior regardless of whether assembly scanning in core is on or off.
This would also fix #183
Additional Context
No response