Payouts: Show failure reasons at prominent places

[nagpai]

Description

We recently started displaying reasons for failed payouts within their details page. This helps merchants to remediate or even become aware of why their payout failed. ( see #10462 )

Since failed payouts are concerning to a merchant and often leads to support requests, it is better to show the failure reason more prominently, without needing to drill-down to a failed payout details page. A few prominent places where the failure reason can be shown:

• Overview page
• Inbox notes
• Email notification

Points to explore:

• The most appropriate places to show the failure message.
• Places like Overview - we may only need to show the last available failure message of a payout, if it is repeatedly failing. This, compared to Payout Details where we show failure message of past failed payouts too.
• Are there existing notices / messaging that can be enhanced to include the failure message, or do we need to add something new?

Additional context

• The enhancement was discussed based on an internal research on feedback received via surveys and reviews from merchants - paJDYF-gYs-p2#comment-28305 h/t @elizaan36 🙌🏼

[elizaan36]

Hey @rogermattic We'd like to send a Failed payout email notification that would complement the in-product notice that was just implemented, The content would contain information based on the same Stripe reason code. I think this would be a good quick win to keep merchants informed at all times of the problem and potential steps to solve it. WDYT?

@nagpai Just noting that in the P2 thread above @aheckler shared that a payout failed email is already sent in cases where it's a Payout and Withdrawal, so we would want to make sure that if another email is triggered on payout failure that the merchant wouldn't get both.

cc @bmccotter