feat(editor): Add template Id to workflow metadata (#8088)

## Summary
Adding a link between the workflow and the template it originated from
by saving `templateId` in the workflow metadata

## Related tickets and issues
ADO-1537

## 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))
- [ ] [Docs updated](https://github.com/n8n-io/n8n-docs) or follow-up
ticket created.
- [x] Tests included.
> A bug is not considered fixed, unless a test is added to prevent it
from happening again.
   > A feature is not complete without tests.

packages/editor-ui/src/mixins/workflowHelpers.ts

@@ -656,6 +656,7 @@ export const workflowHelpers = defineComponent({
 				settings: this.workflowsStore.workflow.settings,
 				tags: this.workflowsStore.workflowTags,
 				versionId: this.workflowsStore.workflow.versionId,
+				meta: this.workflowsStore.workflow.meta,
 			};
 
 			const workflowId = this.workflowsStore.workflowId;