Bug 29931: [21.05.x] Check cookie status before continuing

Bug 29931: [21.05.x] Check cookie status before continuing

Test plan:
Logout from staff.
Try to run plugins-enable (you should have some active plugin).
Like: https://yourserver:staffport/cgi-bin/koha/plugins/plugins-enable.pl?class=Koha::Plugin::Test&method=enable
Replace class and method as appropriate.
Verify that with this patch, you will be redirected to 401 page.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Bug 29931: (follow-up) Similar thing in opac-patron-image.pl

Although less harmful indeed. No borrowernumber, no image.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Tested: logged in, logged out, prefs toggled. All fine.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Bug 29931: (follow-up) Fix svc/checkouts and return_claims too

Adding the same auth_status check here too.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>