* chore: add alias for InitTestDB and Session
Adds an alias for the sqlstore InitTestDB and Session, and updates tests using these to reduce dependencies on the sqlstore.Store.
* next pass of removing sqlstore imports
* last little bit
* remove mockstore where possible
* SQLStore: Ensure that sessions are always closed
Delete `NewSession()` in favour of `WithDbSession()`
* Add WithDbSessionForceNewSession to the interface
* Apply suggestions from code review
