feat(editor): Update copy: Execute --> Test (#8137)

## Summary

Title self explanatory


## Related tickets and issues
https://linear.app/n8n/issue/ADO-129/update-copy-execute-test

## Review / Merge checklist
- [x] PR title and summary are descriptive. **Remember, the title
automatically goes into the changelog. Use `(no-changelog)` otherwise.**
([conventions](https://github.com/n8n-io/n8n/blob/master/.github/pull_request_title_conventions.md))

cypress/fixtures/Test_workflow_ndv_version.json

@@ -4,7 +4,7 @@
 	  {
 		"parameters": {},
 		"id": "aadaed66-84ed-4cf8-bf21-082e9a65db76",
-		"name": "When clicking \"Execute Workflow\"",
+		"name": "When clicking \"Test Workflow\"",
 		"type": "n8n-nodes-base.manualTrigger",
 		"typeVersion": 1,
 		"position": [