Use correct end handle position when drawing a connection (#4382)

* use correct end handle position \when drawing connection lines

* provide correct connection end handle, also when connection is invalid

* add end handle position to connection despite being invalid

* chore(connectionline): remove logs

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Co-authored-by: moklick <info@moritzklack.com>

examples/react/src/examples/Validation/index.tsx

@@ -41,7 +41,7 @@ const CustomInput: FC<NodeProps> = () => (
 
 const CustomNode: FC<NodeProps> = ({ id }) => (
   <>
-    <Handle type="target" position={Position.Left} isConnectableStart={false} />
+    <Handle type="target" position={Position.Top} isConnectableStart={false} />
     <div>{id}</div>
     <Handle type="source" position={Position.Right} />
   </>