ingestion manifest creation for EVLA CAL ingestion only

Next step is refactoring to IngestionManifestIF and having EVLA CAL ingestion manifest implement it, but I wanted to get this out there for review.

added 12 commits

• 1739141e - 1 commit from branch main
• 8464972c - WS-507: NOT READY FOR PRIME TIME; committing so others can take over.
• 5dff3019 - Changed int representation of telescopes to strings as I feel it makes
• 4a186fa3 - Minor formatting
• 7f2c4bbb - Implemented ingestion_artifacts tar writing (w/ test)
• 9dea3d14 - Began implementation of science product parsing from directory content
• 743816e3 - Small comment about implementation detail
• 948bfbb1 - WS-507: WIP -- EVLA CAL ingestion manifest creation
• 841c7dc7 - WS-507: Refactored to eliminate circular dependency and `__repr__()`s; tests pass.
• d1f428c9 - WS-507: Corrections per review of MR333
• 3f884957 - WS-507: Last touches on MR333
• 5ee8165e - WS-507: Last touches on MR333, really this time

Compare with previous version

enabled an automatic merge when the pipeline for 5ee8165e succeeds

merged