Show information about the Stripe account linked to a competition

[timreyn]

Is your feature request related to a problem? Please describe.
We recently opened registration for a competition (MysticCubikon2023) for which Stripe was linked months ago. Since then, that Stripe account has been suspended, meaning that competitors can't pay for it. I'm not aware of any way of seeing what account is linked to a competition, so it was difficult for us to catch this beforehand.

This also means that, if an organizer were to link their personal Stripe account before we got the chance to link our organization's Stripe account, it would be hard for us to detect this before they collected thousands of dollars.

Describe the solution you'd like
On the "setup payments" page, show the name of the the linked account, and some sort of ID number to distinguish it from impostors.

(I'm not sure what information is available from the Stripe API)