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/services/teamguardian/database/database.go

@@ -3,9 +3,8 @@ package database
 import (
 	"context"
 
+	"github.com/grafana/grafana/pkg/infra/db"
 	"github.com/grafana/grafana/pkg/models"
-	"github.com/grafana/grafana/pkg/services/sqlstore"
-	"github.com/grafana/grafana/pkg/services/sqlstore/db"
 	"github.com/grafana/grafana/pkg/services/team"
 )
 
@@ -27,7 +26,7 @@ func (t *TeamGuardianStoreImpl) GetTeamMembers(ctx context.Context, query models
 }
 
 func (t *TeamGuardianStoreImpl) DeleteByUser(ctx context.Context, userID int64) error {
-	return t.sqlStore.WithTransactionalDbSession(ctx, func(sess *sqlstore.DBSession) error {
+	return t.sqlStore.WithTransactionalDbSession(ctx, func(sess *db.Session) error {
 		var rawSQL = "DELETE FROM team_member WHERE user_id = ?"
 		_, err := sess.Exec(rawSQL, userID)
 		return err