[terraform] service connection error alarms

Summary:
This sets up our alarms for errors connecting service A to service B.

We've specified all the relevant log groups in locals. This diff creates alarms that match on dns error in logs. The "dns error" error is included as part of tonic when failing to connect

Test Plan: terraform apply. Tested by launching services configured with improper identity domain name on staging and confirming that alarms are activated

Reviewers: bartek, varun

Reviewed By: bartek

Subscribers: tomek, ashoat

Differential Revision: https://phab.comm.dev/D12579