Have a more sensible retry policy on failing SQS messages

[qsweber]

Don't retry something infinitely, especially if it will never be fixed. For message handlers that send multiple messages, this could result in us sending the same message hundreds of times.

[qsweber]

Mostly done:

lunch-buddies/src/lunch_buddies/app/handlers.py

Line 33 in 7544031

service_context.clients.sqs_v2.set_visibility_timeout_with_backoff(