### 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
if task.loop_with in lookup_loader:
                fail = True
                if task.loop_with == 'first_found':
                    
                    fail = False
                try:
                    loop_terms = listify_lookup_plugin_terms(terms=task.loop, templar=templar, fail_on_undefined=fail, convert_bare=False)
                    if not fail:
                        loop_terms = [t for t in loop_terms if not templar.is_template(t)]
                    mylookup = lookup_loader.get(task.loop_with, loader=self._loader, templar=templar)
                    
                    for subdir in ['template', 'var', 'file']:  
                        if subdir in task.action:
                            break
                    setattr(mylookup, '_subdir', subdir + 's')
                    items = wrap_var(mylookup.run(terms=loop_terms, variables=vars_copy))
                except AnsibleTemplateError:
                    
                    
                    items = [None]
            else:
                raise AnsibleError("Failed to find the lookup named '%s' in the available lookup plugins" % task.loop_with)
        elif task.loop is not None:
            try:
                items = templar.template(task.loop)
            except AnsibleTemplateError:
                
                
                items = [None]
        else: