ALN follow-up tasks

[phildominguez-gsa]

Follow ups from #4545

Tasks

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1. Improve validation for ALNs upon workbook uploads
2. Un-date the schema CSVs #4688
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Improve validation for ALNs upon workbook uploads

Currently only regex-based validation is done for ALNs (extensions must have 3 digits, for example). Instead, we can validate that only ALNs found in FederalProgramNames.json are accepted.

Un-date the schema CSVs

Currently we date the cfda-lookup CSV filenames. We probably don't need to do this anymore and can instead rely on Github history keeping. Possibly we can do the same for cluster-names and cfda-agencies?