Description of problem:

Unable to get Ceph configuration value via Cephadm ansible playbook using module ceph_config


Version-Release number of selected component (if applicable):
RHCS 5.3z3 (16.2.10-172.el8cp)

How reproducible:
It is happening all the time if we choose specific few ceph configuration parameters

Steps to Reproduce:
1. Write a cephadm-ansible playbook using ceph_config task
2. Try to get the value of a Ceph configuration (example, mgr/dashboard/<NODE_NAME>/server_addr)
3. The task fails to get the value, although same value can be retrieved via ceph config dump. 

Actual results:

It is failed to fetch the value

~~~
TASK [get the mgr/dashboard/<NODE_NAME>/server_addr configuration] ******************************************************************************************************************************************************
task path: /usr/share/cephadm-ansible/test.yml:7
ok: [rhcs5-admin] => changed=false 
  ansible_facts:
    discovered_interpreter_python: /usr/libexec/platform-python
  cmd:
  - cephadm
  - shell
  - ceph
  - config
  - dump
  - --format
  - json
  delta: '0:00:02.256076'
  end: '2023-06-07 18:02:25.640664'
  rc: 0
  start: '2023-06-07 18:02:23.384588'
  stderr: No value found for who=mgr option=mgr/dashboard/<NODE_NAME>/server_addr  <=== Unable to find the config parameter
  stderr_lines: <omitted>
  stdout: ''
  stdout_lines: <omitted>
~~~


Expected results:

It should be able to fetch the value


Additional info:

It is not happening for all the ceph configuration parameters, I have noticed it for the parameter mgr/dashboard/<NODE_NAME>/server_addr.