Synthesize OCI tenancy names as tags

[intjonathan]

Description

Add the tenancy name of each resource to the CBF output files. It's added as a synthesized tag on the resource, at least for now, as CBF doesn't yield a standard account name field. An additional API call is required for each unique tenancy ID in the OCI cost file set, along with permissions necessary in Oracle for the API user to make the call (TENANCY_INSPECT).

References

Fulfills #2

Testing

• Verify that a new drop populates the tenant name on all rows.
• Verify that CZ backfills this tag to old lineitems.

Checklist

• I have added documentation for new/changed functionality in this PR
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not main

[intjonathan]

This is working currently in our fetcher lambda! We have a permissions issue to sort out in our OCI org that I'd like to bring docs in here about before this lands.

[silvexis]

Is this still valid? Sorry for the delay.

[intjonathan]

It needs an update, will fix and ping when ready.

[intjonathan]

@silvexis Added docs and RFR!