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##### SUMMARY
<!--- Explain the problem briefly below -->
I've talked about this with @gundalow in https://github.com/theforeman/foreman-ansible-modules/pull/591#issuecomment-561712408 but it seems to be forgotten.

`apt_repo` is for managing ALT Linux repositories, unlike `apt_repository` which is for Debian repositories. As we aim to only support Debian and Red Hat family OSes in "base", `apt_repo` should be moved to a collection.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
apt_repo

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below

```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->


##### STEPS TO REPRODUCE
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```yaml

```

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##### EXPECTED RESULTS
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##### ACTUAL RESULTS
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```paste below

```

update: yes
'''
RETURN = ''' # '''
import os
from ansible.module_utils.basic import AnsibleModule
APT_REPO_PATH = "/usr/bin/apt-repo"
def apt_repo(module, *args):
    """run apt-repo with args and return its output"""
    
    args = list(args)
    rc, out, err = module.run_command([APT_REPO_PATH] + args)
    if rc != 0:
        module.fail_json(msg="'%s' failed: %s" % (' '.join(['apt-repo'] + args), err))
    return out
def add_repo(module, repo):
    """add a repository"""
    apt_repo(module, 'add', repo)
def rm_repo(module, repo):
    """remove a repository"""
    apt_repo(module, 'rm', repo)
def set_repo(module, repo):
    """add a repository and remove other repositories"""
    
    apt_repo(module, 'add', repo)
    apt_repo(module, 'rm', 'all')
    apt_repo(module, 'add', repo)
def update(module):
    """update package cache"""
    apt_repo(module, 'update')
def main():