### Summary

When using the `ansible.builtin.assemble` module with `--diff`, the task fails with the following error:
> Unexpected failure during module execution: ActionBase._get_diff_data() missing 1 required positional argument: 'content'

`ansible-playbook -vvvv` says the relevant function call happens in [ansible/plugins/action/assemble.py, line 143](https://github.com/ansible/ansible/blob/6ebefaceb6cd0d4961776a94d63a71fc1fc28bc0/lib/ansible/plugins/action/assemble.py#L143).  
Note: on my local machine that's currently line 144; 143 is on the current devel branch.

The last known working version is 8.6.1


### Issue Type

Bug Report

### Component Name

ansible.builtin.assemble

### Ansible Version

```console
$ ansible --version
ansible [core 2.16.0]
  config file = None
  configured module search path = ['/Users/albalitz/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /opt/homebrew/Cellar/ansible/9.0.1/libexec/lib/python3.12/site-packages/ansible
  ansible collection location = /Users/albalitz/.ansible/collections:/usr/share/ansible/collections
  executable location = /opt/homebrew/bin/ansible
  python version = 3.12.0 (main, Oct  3 2023, 16:20:33) [Clang 14.0.3 (clang-1403.0.22.14.1)] (/opt/homebrew/Cellar/ansible/9.0.1/libexec/bin/python)
  jinja version = 3.1.2
  libyaml = True
```


### Configuration

```console
$ ansible-config dump --only-changed -t all
CONFIG_FILE() = None
EDITOR(env: EDITOR) = /usr/bin/vim
PAGER(env: PAGER) = less
```


### OS / Environment

This happens on my local machine running MacOS Sonoma 14.1.2 (Ansible installed via homebrew) as well as our CI system running in a `python:alpine`-based Docker environment with the same Ansible version as above (Ansible is installed via pip there and updated semi-automatically using renovatebot).

### Steps to Reproduce

This step fails with the error described above:
```yaml
- name: create concatenated file
  local_action:
    module: assemble
    remote_src: false
    src: files/some_files/
    dest: /tmp/concatenated_file
  no_log: true
  changed_when: false
  check_mode: no
  become: no
  run_once: true
```

The step works when `--diff` is removed from the `ansible-playbook` command.

### Expected Results

I expected the `assemble` step to run successfully and produce a concatenated file with `--diff` enabled but without printing the diff (due to `no_log: true` - I set that to `false` for debugging purposes to see the error message).

### Actual Results

```console
<localhost> ESTABLISH LOCAL CONNECTION FOR USER: albalitz
<localhost> EXEC /bin/sh -c 'echo ~albalitz && sleep 0'
<localhost> EXEC /bin/sh -c '( umask 77 && mkdir -p "` echo /Users/albalitz/.ansible/tmp `"&& mkdir "` echo /Users/albalitz/.ansible/tmp/ansible-tmp-1701782995.5552058-23181-40564253413079 `" && echo ansible-tmp-1701782995.5552058-23181-40564253413079="` echo /Users/albalitz/.ansible/tmp/ansible-tmp-1701782995.5552058-23181-40564253413079 `" ) && sleep 0'
Using module file /opt/homebrew/Cellar/ansible/9.0.1/libexec/lib/python3.12/site-packages/ansible/modules/stat.py
<localhost> PUT /Users/albalitz/.ansible/tmp/ansible-local-23119muc1g04o/tmp8owc8yoz TO /Users/albalitz/.ansible/tmp/ansible-tmp-1701782995.5552058-23181-40564253413079/AnsiballZ_stat.py
<localhost> EXEC /bin/sh -c 'chmod u+x /Users/albalitz/.ansible/tmp/ansible-tmp-1701782995.5552058-23181-40564253413079/ /Users/albalitz/.ansible/tmp/ansible-tmp-1701782995.5552058-23181-40564253413079/AnsiballZ_stat.py && sleep 0'
<localhost> EXEC /bin/sh -c '/opt/homebrew/Cellar/ansible/9.0.1/libexec/bin/python /Users/albalitz/.ansible/tmp/ansible-tmp-1701782995.5552058-23181-40564253413079/AnsiballZ_stat.py && sleep 0'
<localhost> EXEC /bin/sh -c 'rm -f -r /Users/albalitz/.ansible/tmp/ansible-tmp-1701782995.5552058-23181-40564253413079/ > /dev/null 2>&1 && sleep 0'
The full traceback is:
Traceback (most recent call last):
  File "/opt/homebrew/Cellar/ansible/9.0.1/libexec/lib/python3.12/site-packages/ansible/executor/task_executor.py", line 165, in run
    res = self._execute()
          ^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/ansible/9.0.1/libexec/lib/python3.12/site-packages/ansible/executor/task_executor.py", line 641, in _execute
    result = self._handler.run(task_vars=vars_copy)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/ansible/9.0.1/libexec/lib/python3.12/site-packages/ansible/plugins/action/assemble.py", line 144, in run
    diff = self._get_diff_data(dest, path, task_vars)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: ActionBase._get_diff_data() missing 1 required positional argument: 'content'
fatal: [shorewall-0 -> localhost]: FAILED! => {}

MSG:

Unexpected failure during module execution: ActionBase._get_diff_data() missing 1 required positional argument: 'content'
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
argument_spec,
            mutually_exclusive=mutually_exclusive,
            required_together=required_together,
            required_one_of=required_one_of,
            required_if=required_if,
            required_by=required_by,
        )
        validation_result = validator.validate(new_module_args)
        new_module_args.update(validation_result.validated_parameters)
        try:
            error = validation_result.errors[0]
        except IndexError:
            error = None
        
        if error:
            msg = validation_result.errors.msg
            if isinstance(error, UnsupportedError):
                msg = f"Unsupported parameters for ({self._load_name}) module: {msg}"
            raise AnsibleActionFail(msg)
        return validation_result, new_module_args
    def cleanup(self, force=False):
        """Method to perform a clean up at the end of an action plugin execution
        By default this is designed to clean up the shell tmpdir, and is toggled based on whether
        async is in use
        Action plugins may override this if they deem necessary, but should still call this method
        via super
        """
        if force or not self._task.async_val:
            self._remove_tmp_path(self._connection._shell.tmpdir)
    def get_plugin_option(self, plugin, option, default=None):