[tunnelbroker] Trigger AMQP reconnect when closing session

Summary:
Most of errors were happening here. WS session was closed so consumer cancelation and queue removal calls weren't able to succeed.

Depends on D13606

Test Plan:
Observing logs on staging. Possible but hard to reproduce with commtest
Can also be reproduced by:

• Connecting a device to healthy Tunnelbroker
• Don't make any traffic
• Disconnect RabbitMQ
• Then disconnect device

Reviewers: kamil, varun, will

Reviewed By: kamil

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D13607