Exposes the consumer timeout configuration value that was changed in the jammy
version of rabbitmq. The value used to default to unlimited, but was changed to
30 minutes. This causes clients to timeout for longer-running jobs.
This change doesn't alter the payload's default value, it override it only when
the user provides a value via juju config.
Closes-Bug: #2020909
Related-Bug: #2067424
Change-Id: I552c04c964c98b2a700cd47e98a2ae491f5fd47b
edf7791f40