Bug 30859: Upgrade jQuery Validation plugin from v1.19.1 to v1.19.4

Bug 30859: Upgrade jQuery Validation plugin from v1.19.1 to v1.19.4

This patch updates the jQuery Validation plugin in both the OPAC and
staff interface. This upgrade brings the plugin to the current latest
version (1.19.4) which includes compatibility fixes for the latest
version of jQuery.

To test, apply the patch and test various forms in the OPAC and staff
interface to confirm that validation is still working correctly.

In the OPAC:

- Patron self-registration: Required fields, password match
  and complexity. Test also the "Forgot password" and "Change password"
  interfaces.

In the staff interface, for example:

- Patrons -> Patron password change: Required fields, password match and
  complexity.
- Administration -> Patron categories -> New category:
  - Required fields
  - One or the other enrollment period inputs
  - Digits required in password expiration, age required, upper age
    limit
  - Numbers required in enrollment and hold fee.
- Administration -> Budgets -> New budget:
  - Required fields
  - End date must be after start date
- Administration -> Cities & towns: Required fields

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomás Cohen Arazi <tomascohen@theke.io>