refactor ♻️: Improve krb5 configuration path extraction

Refactored the code to use a more robust regex pattern and added a default value for the extracted path.

tasks/kerberos.yml

@@ -1,9 +1,10 @@
 ---
-- name: Extract krb5.conf path from provision output
-  # The samba-tool output usually contains the path on a specific line.
-  # We extract the path using regex and the 'search' filter.
+- name: Extract krb5.conf path from provision output (robust)
   ansible.builtin.set_fact:
-    krb5_conf_path: "{{ samba_provision_output.stdout | regex_search('krb5.conf file is located at (.*)', '\\1') | first }}"
+    krb5_conf_path: >-
+      {{ (samba_provision_output.stdout
+          | regex_search('generated at ([^\n]+/krb5\\.conf)', '\\1')
+          | first) | default('', true) }}
   when: samba_provision_output.stdout is defined
 
 - name: Copy krb5.conf to /etc/krb5.conf