Set service_type in [keystone_authtoken] for access rule validation

Without service_type configured, keystonemiddleware cannot validate
application credentials with custom access rules, causing HTTP 401
for end users.

Closes: OSPRH-22365

Signed-off-by: Veronika Fisarova <vfisarov@redhat.com>

Author: Deydra71

templates/swiftproxy/config/00-proxy-server.conf

@@ -97,6 +97,7 @@ project_name = service
 {{ if (index . "KeystoneRegion") -}}
 region_name = {{ .KeystoneRegion }}
 {{ end -}}
+service_type = object-store
 delay_auth_decision = True
 
 [filter:s3api]