chore: remove sqlstore & mockstore dependencies from (most) packages (#57087)

* 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

pkg/api/org_users_test.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/infra/db"
 	"github.com/grafana/grafana/pkg/infra/localcache"
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
@@ -47,7 +48,7 @@ func TestOrgUsersAPIEndpoint_userLoggedIn(t *testing.T) {
 	hs := setupSimpleHTTPServer(featuremgmt.WithFeatures())
 	settings := hs.Cfg
 
-	sqlStore := sqlstore.InitTestDB(t)
+	sqlStore := db.InitTestDB(t)
 	sqlStore.Cfg = settings
 	hs.SQLStore = sqlStore
 	orgService := orgtest.NewOrgServiceFake()