chore(resourcehierarchy): disambiguate prj-c-logging and prj-c-billing-logs

[eeaton]

This PR changes one project name and moves one resource to another project for logical grouping where the implementation differs from the original design.

Change 1: improve unclear project names

• prj-c-logging was intended to contain all the audit logs from across the org.
• prj-c-billing-logs was intended to contain the export of detailed cost data to BigQuery. "logs" is a misleading name, because logs are not involved. I proposed prj-c-billing-export as a more clear name for the purpose.

Change 2: location of billing account log sink

In v4 changes, we added a billing account log sink to collect admin activity logs related to changes on the Billing Account. This should be grouped into the same project as other admin activity logs from across the org, but was accidentally deployed to the project for cost data exports, so I've moved the sink destination to prj-c-logging

[eeaton]

@sleighton2022 can I get a review on this one? non-functional changes