move Connection interface to api/database, and edgejob type definitions to api/dataservices/edgejobs to reduce the number of deps on portainer., and make deps on specific structures more obvious

Signed-off-by: Sven Dowideit <sven.dowideit@portainer.io>

api/database/database.go

@@ -3,12 +3,11 @@ package database
 import (
 	"fmt"
 
-	portainer "github.com/portainer/portainer/api"
 	"github.com/portainer/portainer/api/database/boltdb"
 )
 
 // NewDatabase should use config options to return a connection to the requested database
-func NewDatabase(storeType, storePath string, encryptionKey []byte) (connection portainer.Connection, err error) {
+func NewDatabase(storeType, storePath string, encryptionKey []byte) (connection Connection, err error) {
 	switch storeType {
 	case "boltdb":
 		return &boltdb.DbConnection{