Bug 30708: Allow modifying attribute linked with AV to another value

If a value is not in the AV list, or if it differs slightly, they would
like to force the modification of the value, without creating a new
authorised value.

Note that this could be a candidate for an option at the attribute
level if there are different needs (ie. for some attributes we don't
want to allow an other value).

Sponsored-by: BULAC - http://www.bulac.fr/

Signed-off-by: BULAC - http://www.bulac.fr/
Signed-off-by: Heather Hernandez <heather_hernandez@nps.gov>
Signed-off-by: Laurence Rault <laurence.rault@biblibre.com>

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

koha-tmpl/intranet-tmpl/prog/js/vue/components/Preservation/TrainsFormAddItem.vue

@@ -46,6 +46,13 @@
                                     :options="
                                         av_options[attribute.option_source]
                                     "
+                                    taggable
+                                    :create-option="
+                                        attribute => ({
+                                            value: attribute,
+                                            description: attribute,
+                                        })
+                                    "
                                 />
                             </span>
                             <span v-else-if="attribute.type == 'free_text'">

t/cypress/integration/Preservation/Trains.ts

@@ -103,7 +103,7 @@ function get_train_items() {
             processing_attribute: processing_attributes[0],
             processing_attribute_id:
                 processing_attributes[0].processing_attribute_id,
-            value: "Paraguay",
+            value: "Not a country",
         },
         {
             processing_attribute: processing_attributes[1],