ACR Tasks `task.yaml` expansion evaluation for debugging

**What is the problem you're trying to solve**
When debugging tasks, it's very tedious to debug the results of go templating.
When errors occur, the line numbers don't reflect the numbers of the `tasks.yaml` authored, rather the expanded line numbers which can send you to very different areas.
There are additional challenges with `-` in `.` notation, or other character escaping.

**Describe the solution you'd like**
- A way to see the expanded go template, with line numbers that match the actual error line numbers.
- The ability to get the results of the yaml expansion without the actual execution `--dry-run` or some such equivalent

**Additional context**
Add any other context or screenshots about the feature request here.