API: Allow changing label, description and tags of an existing file

[raprasad]

Complementary feature to adding a file via API

• related: Allow file uploads for non-zip files through the API #1612 API: add endpoint for restricting files #2497

Description of API:

• Modifying label, description, categories or tags for 1 or more SELECTED files in a dataset
  • API endpoint receives list of file ids (database ids)
• Modifying label, description, categories or tags for ALL files in a dataset
  • API endpoint receives dataset id or persistent identifier
• Distinguish between:
  • ADDing to existing tag
  • REPLACING existing tags with the new list

Note: Currently there is no way to add tabular tags via API.

Starting point

Scratch code to get started

• Logic for Files.java API: https://gist.github.com/raprasad/c962ce00217a169238f5461138326135
• Add this to the datasetutility package: https://gist.github.com/raprasad/e714c99ec1731d41442cffd27e875397

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[pdurbin]

Not a bad idea but this issue doesn't have a champion anymore. Closing.