### 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
(ansible_common_remote_group is set AND the chgrp (or following chmod)
          returned non-zero), we can set the file to be world readable so that
          the second unprivileged user can read the file.
          Since this could allow other users to get access to private
          information we only do this if ansible is configured with
          "allow_world_readable_tmpfiles" in the ansible.cfg. Also note that
          when ansible_common_remote_group is set this final fallback is very
          unlikely to ever be triggered, so long as chgrp was successful. But
          just because the chgrp was successful, does not mean Ansible can
          necessarily access the files (if, for example, the variable was set
          to a group that remote_user is in, and can chgrp to, but does not have
          in common with become_user).
        """
        if remote_user is None:
            remote_user = self._get_remote_user()
        
        if getattr(self._connection._shell, "_IS_WINDOWS", False):
            
            
            
            return remote_paths
        
        
        if not self._is_become_unprivileged():
            if execute:
                
                
                res = self._remote_chmod(remote_paths, 'u+x')
                if res['rc'] != 0:
                    raise AnsibleError(