### Summary

See: https://github.com/ansible/ansible/blob/devel/lib/ansible/modules/git.py#L760 :

```py
            repo_path = os.path.join(repo_path.split('.git')[0], gitdir)
```

the intention of this code seems to be to strip `.git` from the end of the path.

If the repo path contains `.git` anywhere, like `/tmp/music.gittern/myrepo`, tasks will unexpectedly fail:

```
fatal: [localhost]: FAILED! => {"changed": false, "details": "/tmp/music/../.git/modules/submodule is not a directory", "msg": "Current repo does not have a valid reference to a separate Git dir or it refers to the invalid path"}
```

For a playbook like:
```yaml
---
- hosts: localhost
  tasks:
   - name: test git
     git: 
        repo: ...
        dest: /tmp/music.gittern/myrepo/submodule
```

I can't tell if this is a potential security issue or just an unexpected corner case. What I am pretty sure I can tell, is that that's not how one strips `.git` from the end of a path.

### Issue Type

Bug Report

### Component Name

git

### Ansible Version

```console
$ ansible --version
2.11
```


### Configuration

```console
$ ansible-config dump --only-changed
ANSIBLE_NOCOWS(/home/enrico/dev/transilience/ansible.cfg) = True
```


### OS / Environment

Debian Bullseye

### Steps to Reproduce

Use submodules in a repo whose path contains `.git` anywhere as part of a file name.
For example:
```yaml
---
- hosts: localhost
  tasks:
   - name: test git
     git: 
        repo: ...
        dest: /tmp/music.gittern/myrepo/submodule
```

### Expected Results

I'd expect directory names like `gato.gito` not to be interpreted specially by mistake

### Actual Results

```console
fatal: [localhost]: FAILED! => {"changed": false, "details": "/tmp/music/../.git/modules/submodule is not a directory", "msg": "Current repo does not have a valid reference to a separate Git dir or it refers to the invalid path"}
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
'''Return URL of remote source for repo.'''
    command = [git_path, 'ls-remote', '--get-url', remote]
    (rc, out, err) = module.run_command(command, cwd=dest)
    if rc != 0:
        
        
        return None
    return to_native(out).rstrip('\n')
def set_remote_url(git_path, module, repo, dest, remote):
    ''' updates repo from remote sources '''
    
    remote_url = get_remote_url(git_path, module, dest, remote)
    if remote_url == repo or unfrackgitpath(remote_url) == unfrackgitpath(repo):
        return False
    command = [git_path, 'remote', 'set-url', remote, repo]
    (rc, out, err) = module.run_command(command, cwd=dest)
    if rc != 0:
        label = "set a new url %s for %s" % (repo, remote)
        module.fail_json(msg="Failed to %s: %s %s" % (label, out, err))
    
    
    return remote_url is not None
def fetch(git_path, module, repo, dest, version, remote, depth, bare, refspec, git_version_used, force=False):