Update github template for customer issues to include troubleshooting steps

Created by: caugustus-sourcegraph

Determine a small set of troubleshooting data that should be gathered for a customer escalation (cpu/memory usage, error logs, etc.). These should apply to both docker-compose and kubernetes deployments and be non-burdensome for the customer to gather.

Work with the CS team to confirm this information is achievable and add it to the github template used for customer escalations.

Potentially helpful / relevant: https://github.com/sourcegraph/src-cli/pull/731

Problem

There is no standard approach to gathering resource information or troubleshooting data during customer escalations. Long-term, we hope to automate the collection of this information, but in the meantime we want to provide a small set of standard information gathered before an issue is escalated.