Bug 27598: Add UPLOAD as a built-in system authorized value category

Bug 27598: Add UPLOAD as a built-in system authorized value category

This patch updates the database so that it includes an "UPLOAD"
authorized value category with the "is_system" flag set to 1.

The upload tool template is updated to add a link to the authorized
value category from the hint which appears if no authorized values exist
in the UPLOAD category.

To test, apply the patch and run the database update.

- If you have manually added an UPLOAD category it should now be
  classified as a system category.
- If you did not have an UPLOAD category it should have been created for
  you.
- With no authorized values in the UPLOAD category, go to Tools ->
  Upload.
  - Logged in as a user with permission to manage authorized values you
    should see a note, "No upload categories are defined..." It should
    contain a link directly to the UPLOAD category of authorized values.
  - Logged in as a user without authorized value permission you should
    see a similar note without the link.
- Add an authorized value in the UPLOAD category and confirm that the
  note disappears.

Signed-off-by: Barbara Johnson <barbara.johnson@bedfordtx.gov>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>