Make step review acceptance criteria explicit on Google Sheets coursework

[illicitonion]

For most of our steps, the acceptance criteria are clear: For PRs they should have been reviewed and that review acted on and have the label complete, for other tasks they're explicitly listed in the ticket.

The Google Sheets exercise on https://programming.codeyourfuture.io/user-data/success/ / CodeYourFuture/Module-User-Focused-Data#104 isn't so obvious. If a new volunteer wanted to review this step, they would probably have to watch the whole video to know whether a linked to spreadsheet is done and correct.

@cjyuan / @SallyMcGrath - you've reviewed loads of these, could you suggest a few bullet points we could add to the issue or the step acceptance criteria on the dashboard so that a new step reviewer can easily verify the Google Sheets project was completed? I'm thinking things like "There is a table named WHERE clause containing 20 rows" - easy to quickly verify.

[SallyMcGrath]

Note:I had planned to remove it from the new onboarding module step, so don't spend TOO long on this.

[illicitonion]

Ooh that's a good point... We should probably re-add this exercise later on in the course (the whole "thinking about data early on" thing was one of my favourite changes we made)...

[cjyuan]

Google sheet should contain

• Original two sheets of data with 100 rows per sheet
• Separate sheets with data selected using the following queries: simple, with multiple WHERE, with ORDER BY, with GROUP BY
• Sheet created with a query that combines data from multiple sheets