Restore individual FERC 1 plant output tables.

[zaneselvans]

Overview

Adds back the individual FERC Form 1 plant output tables (large steam, hydro, pumped hydro, small) since they are more ergonomic to work with when you need a single type of plant, and the concatenated all-plants table has no easy way to select on the source table.

These tables were already being written to the DB, just with a _out prefix, since they were needed by PudlTabl to maintain its old per-table access behavior, so this was just a rename of those tables and references to them, and didn't require any new metadata compilation / Resource definition.

Closes #3416

Testing

Ran the full ETL locally, and it was able to deal with the new output tables and their downstream dependencies.

To-do list

Beta Give feedback

1. For significant ETL changes, ensure the full ETL runs locally
2. Update the release notes: reference the PR and related issues.
3. Ensure docs build, unit & integration tests, and test coverage pass locally with make pytest-coverage (otherwise the merge queue may reject your PR)