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))

packages/editor-ui/src/composables/__tests__/__snapshots__/useContextMenu.test.ts.snap

@@ -14,7 +14,7 @@ exports[`useContextMenu > Read-only mode > should return the correct actions whe
   {
     "disabled": true,
     "id": "execute",
-    "label": "Execute node",
+    "label": "Test node",
   },
   {
     "disabled": true,
@@ -181,7 +181,7 @@ exports[`useContextMenu > should return the correct actions opening the menu fro
   {
     "disabled": false,
     "id": "execute",
-    "label": "Execute node",
+    "label": "Test node",
   },
   {
     "disabled": false,
@@ -279,7 +279,7 @@ exports[`useContextMenu > should return the correct actions when right clicking
   {
     "disabled": false,
     "id": "execute",
-    "label": "Execute node",
+    "label": "Test node",
   },
   {
     "disabled": false,

packages/editor-ui/src/composables/useContextMenu.ts

@@ -219,7 +219,7 @@ export const useContextMenu = (onAction: ContextMenuActionCallback = () => {}) =
 							},
 							{
 								id: 'execute',
-								label: i18n.baseText('contextMenu.execute'),
+								label: i18n.baseText('contextMenu.test'),
 								disabled: isReadOnly.value,
 							},
 							{