postgresql_user: `alter user` statements missing in return value

[betanummeric]

bug

The return value queries should contain a "List of executed queries", but when an existing user is alerted the alter user statements are not in the return value.

create user and drop user statements appear as expected in the return value.

tested versions

community.postgresql: 2.1.5
ansible-playbook: 2.10.8
python: 3.9.2
targeted postgresql: 14

how to repoduce

- hosts: all
  gather_facts: no
  remote_user: postgres
  tasks:
    - name: create user
      community.postgresql.postgresql_user:
        db: postgres
        name: testuser
        password: testpw
        state: present
        login_unix_socket: /tmp
      register: created_user
    - name: debug created_user
      debug:
        msg: "{{ created_user }}"

    - name: alter user
      community.postgresql.postgresql_user:
        db: postgres
        name: testuser
        password: different_password
        state: present
        login_unix_socket: /tmp
      register: altered_user
    - name: debug altered_user
      debug:
        msg: "{{ altered_user }}"

    - name: drop user
      community.postgresql.postgresql_user:
        db: postgres
        name: testuser
        state: absent
        login_unix_socket: /tmp
      register: dropped_user
    - name: debug dropped_user
      debug:
        msg: "{{ dropped_user }}"

This outputs:

TASK [debug altered_user] ******************************************************************************************************************
task path: /var/go/pwtest/test.yml:26
ok: [my-test-server] => {
    "msg": {
        "changed": true,
        "failed": false,
        "queries": [],
        "user": "testuser"
    }
}

But I expected:

TASK [debug altered_user] ******************************************************************************************************************
task path: /var/go/pwtest/test.yml:26
ok: [my-test-server] => {
    "msg": {
        "changed": true,
        "failed": false,
        "queries": [
            "ALTER USER \"testuser\" WITH ENCRYPTED PASSWORD %(password)s "
        ],
        "user": "testuser"
    }
}