[backport core/1.34] fix: prevent middle mouse button from triggering node resize in vueNodes mode (#7528)

Backport of #7511 to `core/1.34`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7528-backport-core-1-34-fix-prevent-middle-mouse-button-from-triggering-node-resize-in-vueN-2ca6d73d36508190af3fc437346f397f)
by [Unito](https://www.unito.io)

Co-authored-by: Terry Jia <terryjia88@gmail.com>

src/renderer/extensions/vueNodes/components/LGraphNode.vue

@@ -327,6 +327,7 @@ const { startResize } = useNodeResize((result, element) => {
 })
 
 const handleResizePointerDown = (event: PointerEvent) => {
+  if (event.button !== 0) return
   if (nodeData.flags?.pinned) return
   startResize(event)
 }