Fix no-changed-when ansible-lint errors

Reference: https://ansible-lint.readthedocs.io/en/latest/default_rules/#no-changed-when

roles/matrix-postgres/tasks/upgrade_postgres.yml

@@ -78,18 +78,21 @@
 # role (`matrix_postgres_connection_username`) and database (`matrix_postgres_db_name`) by itself on startup,
 # we need to remove these from the dump, or we'll get errors saying these already exist.
 - name: Perform Postgres database dump
-  ansible.builtin.command: >-
-    {{ matrix_host_command_docker }} run --rm --name matrix-postgres-dump
-    --log-driver=none
-    --user={{ matrix_user_uid }}:{{ matrix_user_gid }}
-    --network={{ matrix_docker_network }}
-    --env-file={{ matrix_postgres_base_path }}/env-postgres-psql
-    --entrypoint=/bin/sh
-    --mount type=bind,src={{ postgres_dump_dir }},dst=/out
-    {{ matrix_postgres_detected_version_corresponding_docker_image }}
-    -c "pg_dumpall -h matrix-postgres
-    {{ '| gzip -c ' if postgres_dump_name.endswith('.gz') else '' }}
-    > /out/{{ postgres_dump_name }}"
+  ansible.builtin.command:
+    cmd: >-
+      {{ matrix_host_command_docker }} run --rm --name matrix-postgres-dump
+      --log-driver=none
+      --user={{ matrix_user_uid }}:{{ matrix_user_gid }}
+      --network={{ matrix_docker_network }}
+      --env-file={{ matrix_postgres_base_path }}/env-postgres-psql
+      --entrypoint=/bin/sh
+      --mount type=bind,src={{ postgres_dump_dir }},dst=/out
+      {{ matrix_postgres_detected_version_corresponding_docker_image }}
+      -c "pg_dumpall -h matrix-postgres
+      {{ '| gzip -c ' if postgres_dump_name.endswith('.gz') else '' }}
+      > /out/{{ postgres_dump_name }}"
+  register: matrix_postgres_upgrade_postgres_dump_command_result
+  changed_when: matrix_postgres_upgrade_postgres_dump_command_result.rc == 0
 
 - name: Ensure matrix-postgres is stopped
   ansible.builtin.service:
@@ -97,7 +100,10 @@
     state: stopped
 
 - name: Rename existing Postgres data directory
-  ansible.builtin.command: "mv {{ matrix_postgres_data_path }} {{ postgres_auto_upgrade_backup_data_path }}"
+  ansible.builtin.command:
+    cmd: "mv {{ matrix_postgres_data_path }} {{ postgres_auto_upgrade_backup_data_path }}"
+  register: matrix_postgres_upgrade_postgres_move_command_result
+  changed_when: matrix_postgres_upgrade_postgres_move_command_result.rc == 0
 
 - ansible.builtin.debug:
     msg: "NOTE: Your Postgres data directory has been moved from `{{ matrix_postgres_data_path }}` to `{{ postgres_auto_upgrade_backup_data_path }}`. In the event of failure, you can move it back and run the playbook with --tags=setup-postgres to restore operation."
@@ -155,7 +161,10 @@
         and restore the automatically-made backup (`mv {{ postgres_auto_upgrade_backup_data_path }} {{ matrix_postgres_data_path }}`).
 
 - name: Perform Postgres database import
-  ansible.builtin.command: "{{ matrix_postgres_import_command }}"
+  ansible.builtin.command:
+    cmd: "{{ matrix_postgres_import_command }}"
+  register: matrix_postgres_upgrade_postgres_import_command_result
+  changed_when: matrix_postgres_upgrade_postgres_import_command_result.rc == 0
 
 - name: Delete Postgres database dump file
   ansible.builtin.file: