Refactoring of memory storage client

[vdusek]

• As the title suggest, we should finally do some bigger memory storage client refactoring.
• fix!: Refactor service usage to rely on service_locator #691 (comment)
  • accept just some smaller part of Configuration in the open_storage
• How to economize on RAM when starting a crawl with a large list of urls? #816
  • problems with disk offloading
• Improve storage manager and merge it with creation_management module #147
  • initialization
• There is probably no need to keep track of an id for each resource client - the memory storage deals with names only
  • but we should consider that we will need to support some kind of an equivalent of Apify's non-default, unnamed storages

[janbuchar]

Regarding that comment on #691, I think that just a Protocol with select properties should do it.