[BUU] Don't reload whole table when deleting products or variants

[dacook]

When performing a delete from the actions menu, the whole table is reloaded. This can take some time, and is jarring because you can lose your position in a long list of products. The old products screen does this so we need to support it here too.

1. After confirming, attempt to delete the chosen row.
2. If delete succeeds, remove the row(s) from the page.
   • Try using a "slide out" animation, to avoid the jump which would cause the user to lose their place.
3. If the action fails, show a flash message explaining why, without changing any other part of the page.

Other notes:

• Should the pagination info be updated ("showing x of x")? For the first iteration, make no changes, this will be re-evaluated later
• Any unsaved edits will remain on the page and not affect progress. (fixes issues when other rows have been edited as pictured)

• Depends on #12361
• Very similar to #11987
• By removing SR, this will close https://github.com/openfoodfoundation/openfoodnetwork/issues/12331