feat(#9653): refactor shared-libs/validations to call cht-datasource

[sugat009]

Description

Refactored the shared-libs/validations library to query cht-datasource when possible while still querying freetext indexes for when there is whitespace in the freetext search string.

Ticket: #9653

Code review checklist

• Readable: Concise, well named, follows the style guide, documented if necessary.
• Tested: Unit and/or e2e where appropriate
• Backwards compatible: Works with existing data and configuration or includes a migration. Any breaking changes documented in the release notes.

Compose URLs

If Build CI hasn't passed, these may 404:

• Core
• CouchDB Single
• CouchDB Cluster

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[sugat009]

I've set the target branch to 9586-implement-freetext-search-in-cht-datasource because it has not been merged to master yet and will show lots of diffs.

[sugat009]

@jkuester I've not added an actual e2e test for this one because the unit tests feel like integration tests for the whole package. Let me know what you think though.

[jkuester]

I don't think we need integration tests specific to shared-libs/validations. However, if it is possible it would be good to have at least one sentinel integration test that triggers this validation code (basically validating the overall workflow that users the validations).