Bug 34056: Add -api-client suffit to authorised-values API client

Bug 34056: Add -api-client suffit to authorised-values API client

In koha-tmpl/intranet-tmpl/prog/js/vue/fetch all files have the -api-client suffix but authorised-values. For consistency we should add it.

Test plan:
Go to the ERM module and confirm that dropdown lists are correctly
filled in with authorised values.
You can also inspect the console and confirm that a GET query to /authorised_value_categories is done

Sponsored-by: BULAC - http://www.bulac.fr/
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>