fix: dbt test bug fixes

[pnadolny13]

Closes #643, #646

• use project deployments table now to do joins properly. Previously we assumed deployments and envs matched and had a test to fail if they didnt. Just yesterday they started failing.
• The other failing test was because the credit counts for orgs in cloud_org_dim and fact_cloud_executions didnt match. This was because cloud_org_dim uses the orgs table as its base and fact_cloud_executions uses the executions metadata table. A few orgs have been hard deleted from the orgs table but their executions still live in on the executions metadata table so when the test tried to diff them it was struggling with nulls. For now I coalesced to a "ORG_DELETED" bucket but can remove that once https://github.com/meltano/infra/issues/978 is done and the source is fixed.