### Summary

Saw this happening with ansible 2.15.3
When using ANSIBLE_DEBUG=1 with a add_host task, the task fails with

ansible/utils/vars.py\", line 91, in combine_vars\n    result = a | b\nTypeError: unsupported operand type(s) for |: 'VarsWithSources' and 'dict'

Same bug with ANSIBLE_DEBUG enabled: https://github.com/ansible/ansible/issues/79763
Where fix is needed: https://github.com/ansible/ansible/blob/3ec0850df9429f4b1abc78d9ba505df12d7dd1db/lib/ansible/utils/vars.py#L91

### Issue Type

Bug Report

### Component Name

add_host

### Ansible Version

```console
$ ansible --version
ansible [core 2.15.3]
  config file = None
  configured module search path = ['/home/runner/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.9/site-packages/ansible
  ansible collection location = /home/runner/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/bin/ansible
  python version = 3.9.17 (main, Jun 13 2023, 16:05:09) [GCC 8.3.0] (/usr/local/bin/python3)
  jinja version = 3.0.3
  libyaml = True
```


### Configuration

```console
# if using a version older than ansible-core 2.12 you should omit the '-t all'
$ ansible-config dump --only-changed -t all
ansible-config [core 2.15.3]
  config file = None
  configured module search path = ['/home/runner/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.9/site-packages/ansible
  ansible collection location = /home/runner/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/bin/ansible-config
  python version = 3.9.17 (main, Jun 13 2023, 16:05:09) [GCC 8.3.0] (/usr/local/bin/python3)
  jinja version = 3.0.3
  libyaml = True
No config file found; using defaults
Loading collection ansible.builtin from
```


### OS / Environment

Debian GNU/Linux 10 (buster)
Linux 3.10.0-1127.el7.x86_64 x86_64

### Steps to Reproduce
```
- name: create inventory
  hosts: localhost
  gather_facts: no
  tasks:
    - add_host:
        name: "{{ item }}"
        groups: resource_types
      with_items:
        - node
        - pod
        - namespace
        - ResourceQuota
```
### Expected Results

successfull result of playbook

### Actual Results

```console
ansible/utils/vars.py\", line 91, in combine_vars\n    result = a | b\nTypeError: unsupported operand type(s) for |: 'VarsWithSources' and 'dict'
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
for the play, host, and task (which could possibly result in different
        sets of variables being returned due to the additional context).
        The order of precedence is:
        - play->roles->get_default_vars (if there is a play context)
        - group_vars_files[host] (if there is a host context)
        - host_vars_files[host] (if there is a host context)
        - host->get_vars (if there is a host context)
        - fact_cache[host] (if there is a host context)
        - play vars (if there is a play context)
        - play vars_files (if there's no host context, ignore
          file names that cannot be templated)
        - task->get_vars (if there is a task context)
        - vars_cache[host] (if there is a host context)
        - extra vars
        ``_hosts`` and ``_hosts_all`` should be considered private args, with only internal trusted callers relying
        on the functionality they provide. These arguments may be removed at a later date without a deprecation
        period and without warning.
        '''
        display.debug("in VariableManager get_vars()")
        all_vars = dict()
        magic_variables = self._get_magic_variables(
            play=play,
            host=host,
            task=task,
            include_hostvars=include_hostvars,
            _hosts=_hosts,
            _hosts_all=_hosts_all,
        )
        _vars_sources = {}
        def _combine_and_track(data, new_data, source):