WIP: Extract raw PHMSA transmission data (A-D, H, I)

[e-belfer]

Overview

Extract raw PHMSA transmission data into tables corresponding to the tabs in the most recent Excel files for Form sections A-D, H, I. Also make a notebook that identifies errors in the column mapping and file mapping CSVs.

What problem does this address?
Brings raw PHMSA transmission data into PUDL!

Testing

How did you make sure this worked? How can a reviewer verify this?

To-do list

Beta Give feedback

1. Make sure full ETL runs & make pytest-integration-full passes locally
2. For major data coverage & analysis changes, run data validation tests
3. If updating analyses or data processing functions: make sure to update or write data validation tests
4. Update the release notes: reference the PR and related issues.
5. Review the PR yourself and call out any questions or issues you have

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