keycloak_client: avoid TypeError if result["attributes"] is a list (#8403)

* fix(keycloak_client): avoid TypeError if attributes is a list

As sanitize_cr might be executed after normalise_cr, result['attributes'] can be of type list and we
run into:

TypeError: list indices must be integers or slices, not str

* Update changelog fragment.

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/8403-fix-typeerror-in-keycloak-client.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+  - keycloak_client - fix TypeError when sanitizing the ``saml.signing.private.key`` attribute in the module's diff or state output. The ``sanitize_cr`` function expected a dict where in some cases a list might occur (https://github.com/ansible-collections/community.general/pull/8403).

plugins/modules/keycloak_client.py

@@ -775,8 +775,9 @@ def sanitize_cr(clientrep):
     if 'secret' in result:
         result['secret'] = 'no_log'
     if 'attributes' in result:
-        if 'saml.signing.private.key' in result['attributes']:
+        attributes = result['attributes']
-            result['attributes']['saml.signing.private.key'] = 'no_log'
+        if isinstance(attributes, dict) and 'saml.signing.private.key' in attributes:
+            attributes['saml.signing.private.key'] = 'no_log'
     return normalise_cr(result)