Fixes #3: Update pipeline_editor_tabs_spec.js for Vue 3 compatibility

What does this MR do and why?

Complete Vue 3 migration with extended wrapper helpers

• Add mountExtended and shallowMountExtended imports
• Update createComponent to use shallowMountExtended by default
• Update createComponentWithApollo to use shallowMountExtended
• Replace mount with mountExtended in all test calls
• Update wrapper queries to use findByTestId for better Vue 3 compatibility
• Complete all Vue 3 migration requirements:
  • ✅ Mount/shallowMount syntax updates
  • ✅ Async handling (already properly implemented)
  • ✅ Wrapper queries updated with extended helpers

This addresses Vue 3 migration requirements for the pipeline editor tabs test spec.

References

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https://cap.link/3e88v9qc07jpnha

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