Unnecessary reminder emails sent for WooPayments sandbox accounts redirecting to staging website

[fashuvo]

Describe the bug

When using a WooPayments sandbox account for testing payments on a staging website, the merchant receives weekly reminder emails prompting them to review account information. However, these emails are unnecessary for sandbox accounts since no payouts are possible, and attempting to click the provided links (e.g., Review your account info or Review my details) redirects back to the merchant's own website instead of a Stripe Express account. This behavior causes confusion and is not relevant in the sandbox/testing mode.

To Reproduce

1. Set up a WooPayments sandbox account for testing purposes on a staging website.
2. Wait for the system to send weekly reminder emails requesting account information review.
3. Open the email and click on the "Review your account info" link or "Review my details" button.
4. Observe that the link redirects back to the staging website instead of a Stripe Express account.

Actual behavior

• Weekly reminder emails are sent for sandbox accounts, which are unnecessary as no payouts can occur in testing mode.
• Clicking on links in these emails redirects to the staging website rather than a Stripe Express account, creating confusion for merchants.

Screenshots

Attached is an example screenshot of the email received:

Expected behavior

• Reminder emails requesting account information review should not be sent for sandbox accounts in testing mode.
• If such emails are sent, they should include accurate links or instructions relevant to sandbox usage without causing confusion.

Additional context

• The merchant does not want to disable all emails of this type, as they are useful for their actual store but irrelevant for sandbox accounts.
• The merchant has requested that this issue be fixed to avoid receiving unnecessary reminders in testing mode while retaining them for live accounts.
• #9623341-zen