Introduce structs/interfacess for new storage units

This commit simply splits the interfaces but introduces no new structs

     - Introduce the QueryPackStore, mrvacommander/pkg/qpstore
     - Introduce the CodeQL database store, pkg/qldbstore/interfaces.go

pkg/storage/container.go

@@ -41,33 +41,6 @@ func NewQLDBStore() (*StorageContainer, error) {
 	return nil, nil
 }
 
-func NewQueryPackStore(startingID int) (*StorageContainer, error) {
-	// TODO set up querypack_db
-	// TODO drop the startingID
-
-	db, err := ConnectDB(DBSpec{
-		Host:     "postgres",
-		Port:     5432,
-		User:     "exampleuser",
-		Password: "examplepass",
-		DBname:   "querypack_db",
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	s := StorageContainer{RequestID: startingID, DB: db}
-	if err := s.SetupDB(); err != nil {
-		return nil, err
-	}
-
-	if err = s.loadState(); err != nil {
-		return nil, err
-	}
-
-	return &s, nil
-}
-
 func NewStorageContainer(startingID int) (*StorageContainer, error) {
 
 	db, err := ConnectDB(DBSpec{