keycloak_client: remove code that turns attributes dict into list (#9077)
* remove code that turns attributes dict into list
* add changelog fragment
* Update changelogs/fragments/9077-keycloak_client-fix-attributes-dict-turned-into-list.yml
Co-authored-by: Felix Fontein <felix@fontein.de>
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Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 62cb6087b5)
Co-authored-by: fgruenbauer <gruenbauer@b1-systems.de>
