Remove deprecated hook_file_validate() and implement Constraint plugins

Just want to jump in and let you know this is in progress for 3.x already, I'll be pushing code in the near future.

As visible at https://git.drupalcode.org/project/clamav/-/merge_requests/11/diffs#54a6...

Closing and rolling into 🌱 Code modernisation Active

Sounds like we should have a convo – I've also got work in progress, which perhaps includes a further level of abstraction and also explores a better implementation of seperation of concerns.

I'm attaching zips of the two relevant modules, but this is literally a day and a half on the new concept, so much left to consider.

Please post a MR for consideration.

An archive is not something I'm going to review.

I'll take a look at a future MR, if you can do the same for the link I posted.

I've been given maintainership for the Antivirus module → , so we have a feasible route for developing in that direction.

The latest WIP is updated in GitHub:

- https://github.com/manarth/antivirus/
- https://github.com/manarth/clamav/

There's a lot of overlap in the principles used in the MR https://git.drupalcode.org/project/clamav/-/merge_requests/11/diffs#54a6... and the above, with some minor variations (use of plugins rather than container-tag definitions, to facilitate using plugin-forms for configuration).

I've published branch 2.x of the Antivirus → module and branch 4.x of ClamAv, which together should provide a D-11 compatible implementation.

It's refactored to use constraints, allow multiple scanners, and offer a more robust future-proof approach.