[terraform] Bump staging Tunnelbroker to 0.18.1

Summary:
Built Tunnelbroker from master. This build contains several fixes, including these from `0.18-amqp`.

Commits included since `0.17`:
- 6f0c5fa [Tunnelbroker] deprecate errors about invalidating device token
- 7517392 [tunnelbroker] Enable Auto-ACK for AMQP consumers
- f121eb8 [tunnelbroker] Fix error handling in main
- b928654 [tunnelbroker] Implement lazy AMQP channel wrapper
- 51a32d2 [tunnelbroker] Recover AMQP before publishing messages
- b5a906d [tunnelbroker] Remove legacy AMQP connect function
- 424644f [tunnelbroker] Ignore connection error messages handled elsewhere
- 5bf4d6b [tunnelbroker] Trigger AMQP reconnect when closing session
- 7649ca4 [tunnelbroker] Recover AMQP consumers
- b43e670 [tunnelbroker] Refactor Websocket session init
- e2324a9 [tunnelbroker] Use AMQP wrapper in servers
- 36e96f2 [tunnelbroker] Implement AMQP reconnect on channel access
- 0018440 [tunnelbroker] Create thread-safe wrapper over AMQP connection
- 3f6ac09 [tunnelbroker] Split AMQP connect function
- 826944b [tunnelbroker] Add exponential backoff to AMQP connection
- 00711ba [tunnelbroker] Add error listener for AMQP
- 39ddee6 [tunnelbroker] Run AMQP on Tokio runtime
- a1e2f49 [tunnelbroker] Disable CSAT verification if env var is set
- acfc198 [Tunnelbroker] retry FCM notif after receiving `401 Unauthorized`
- 1d09ec4 [terraform] downgrade non-server errors to debug

Test Plan: terraform plan

Reviewers: will, bartek

Reviewed By: bartek

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D13660

services/terraform/remote/service_tunnelbroker.tf

@@ -1,7 +1,7 @@
 locals {
   tunnelbroker_config = {
     docker_image = "commapp/tunnelbroker"
-    docker_tag   = local.is_staging ? "0.18-amqp" : "0.18-amqp"
+    docker_tag   = local.is_staging ? "0.18.1" : "0.18-amqp"
 
     grpc_port      = 50051
     websocket_port = 51001