We want to output test results to Google Sheets with multiple providers. It is currently only outputting the last provider. I had expected it would match the CSV output instead. How should this behave? I'll share a simple PR ([link](https://github.com/promptfoo/promptfoo/pull/6528)) to fix it by showing all responses as unique columns. Happy to provide a more extensive change if you would like it to match the CSV format. Context: We are trying to improve the workflow for less technical users. We planned to have them write questions in a Google Sheet, then post the responses to a new sheet. p.s. We love promptfoo. Thank you for the fantastic framework.

Thank you @smaclell !