Add matrix_playbook_migration_matrix_postmoogle_migration_validation_enabled

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

roles/custom/matrix_playbook_migration/defaults/main.yml

@@ -27,6 +27,9 @@ matrix_playbook_migration_matrix_aux_migration_validation_enabled: true
 # Controls if (`matrix_jitsi` -> `jitsi`) validation will run.
 matrix_playbook_migration_matrix_jitsi_migration_validation_enabled: true
 
+# Controls if (`matrix_bot_postmoogle_` -> `matrix_postmoogle_`) validation will run.
+matrix_playbook_migration_matrix_postmoogle_migration_validation_enabled: true
+
 # Controls if the old apt repository (likely without a `signed-by` option) on Debian-based systems will be removed.
 #
 # Older versions of the Docker role (5.x, 6.x) used to install a repository at a path like: `/etc/apt/sources.list.d/download_docker_com_linux_*`

roles/custom/matrix_playbook_migration/tasks/validate_config.yml

@@ -223,7 +223,7 @@
           We found usage of the following variables: {{ matrix_playbook_migration_jitsi_migration_vars.keys() | join(', ') }}
       when: "matrix_playbook_migration_jitsi_migration_vars | length > 0"
 
-- when: matrix_playbook_migration_matrix_jitsi_migration_validation_enabled | bool
+- when: matrix_playbook_migration_matrix_postmoogle_migration_validation_enabled | bool
   block:
     - ansible.builtin.set_fact:
         matrix_playbook_migration_postmoogle_migration_vars: |-