style: remove pulsing animation on executing Vue nodes (#6206)

## Summary

Removes pulsing animation which wasn't part of the original design and
has performance overhead.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6206-style-remove-pulsing-animation-on-executing-Vue-nodes-2946d73d3650816ab877da8120ab4085)
by [Unito](https://www.unito.io)

tests-ui/tests/renderer/extensions/vueNodes/components/LGraphNode.test.ts

@@ -197,11 +197,11 @@ describe('LGraphNode', () => {
     expect(wrapper.classes()).toContain('outline-node-component-outline')
   })
 
-  it('should apply executing animation when executing prop is true', () => {
+  it('should render progress indicator when executing prop is true', () => {
     mockData.mockExecuting = true
 
     const wrapper = mountLGraphNode({ nodeData: mockNodeData })
 
-    expect(wrapper.classes()).toContain('animate-pulse')
+    expect(wrapper.classes()).toContain('border-node-stroke-executing')
   })
 })