Do a manual run of billing for cloud costs for hubs on shared cluster on GCP

[yuvipanda]

Context

We want to have clear and detailed documentation for how various billing processes can be done manually by someone other than me. This helps remove me as a bottleneck / single point of failure, and paves the way for fuller automation.

This issue is focused simply on the shared cluster on GCP

Proposal

• [ ] Yuvi writes documentation (a runbook) for manually reporting AWS cloud costs.
• [ ] Somoene else goes through this process, and makes changes to the document as they go to make sure it is accurate
• [ ] Notify CS&S that this has been updated for January
• [ ] This document gets reviewed and merged into our documentation

Updates and actions

[yuvipanda]

Superseeded by https://github.com/2i2c-org/meta/issues/1003