### Summary

When I run setup module to get Debian 10.7 distribution information, it reported ansible_distribution_version=10. The real version is in /etc/debian_version, which is 10.7.
```
$ ansible 10.117.16.248   -m setup -a "filter=ansible_distribution*"
10.117.16.248 | SUCCESS => {
    "ansible_facts": {
        "ansible_distribution": "Debian",
        "ansible_distribution_file_parsed": true,
        "ansible_distribution_file_path": "/etc/os-release",
        "ansible_distribution_file_variety": "Debian",
        "ansible_distribution_major_version": "10",
        "ansible_distribution_release": "buster",
        "ansible_distribution_version": "10"
    },
    "changed": false
}

$ ansible 10.117.16.248 -m shell -a "cat /etc/os-release"
10.117.16.248 | CHANGED | rc=0 >>
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

$ ansible 10.117.16.248 -m shell -a "cat /etc/debian_version"
10.117.16.248 | CHANGED | rc=0 >>
10.7
```


### Issue Type

Bug Report

### Component Name

setup

### Ansible Version

```console
$ ansible --version
ansible 2.10.4
  config file = /home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg
  configured module search path = ['/home/qiz/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.6/dist-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 3.6.9 (default, Jan 26 2021, 15:33:00) [GCC 8.4.0]
```


### Configuration

```console
$ ansible-config dump --only-changed
ANSIBLE_SSH_RETRIES(/home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg) = 5
DEFAULT_CALLBACK_PLUGIN_PATH(/home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg) = ['/home/qiz/workspace/github/ansible-vsphe
DEFAULT_CALLBACK_WHITELIST(/home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg) = ['timer']
DEFAULT_HOST_LIST(/home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg) = ['/home/qiz/workspace/github/ansible-vsphere-gos-vali
DISPLAY_SKIPPED_HOSTS(/home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg) = False
RETRY_FILES_ENABLED(/home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg) = False
```


### OS / Environment

Debian 10.7

### Steps to Reproduce

<!--- Paste example playbooks or commands between quotes below -->
```yaml (paste below)

```


### Expected Results

I expected to get ansible_distribution_version=10.7 as below not 10.
$ ansible 10.117.16.248   -m setup -a "filter=ansible_distribution*"
10.117.16.248 | SUCCESS => {
    "ansible_facts": {
        "ansible_distribution": "Debian",
        "ansible_distribution_file_parsed": true,
        "ansible_distribution_file_path": "/etc/os-release",
        "ansible_distribution_file_variety": "Debian",
        "ansible_distribution_major_version": "10",
        "ansible_distribution_release": "buster",
        "ansible_distribution_version": "10.7"
    },
    "changed": false
}

### Actual Results

```console
$ ansible 10.117.16.248   -m setup -a "filter=ansible_distribution*"
10.117.16.248 | SUCCESS => {
    "ansible_facts": {
        "ansible_distribution": "Debian",
        "ansible_distribution_file_parsed": true,
        "ansible_distribution_file_path": "/etc/os-release",
        "ansible_distribution_file_variety": "Debian",
        "ansible_distribution_major_version": "10",
        "ansible_distribution_release": "buster",
        "ansible_distribution_version": "10"
    },
    "changed": false
}
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
{'path': '/etc/system-release', 'name': 'Amazon'},
        {'path': '/etc/alpine-release', 'name': 'Alpine'},
        {'path': '/etc/arch-release', 'name': 'Archlinux', 'allowempty': True},
        {'path': '/etc/os-release', 'name': 'Archlinux'},
        {'path': '/etc/os-release', 'name': 'SUSE'},
        {'path': '/etc/SuSE-release', 'name': 'SUSE'},
        {'path': '/etc/gentoo-release', 'name': 'Gentoo'},
        {'path': '/etc/os-release', 'name': 'Debian'},
        {'path': '/etc/lsb-release', 'name': 'Debian'},
        {'path': '/etc/lsb-release', 'name': 'Mandriva'},
        {'path': '/etc/sourcemage-release', 'name': 'SMGL'},
        {'path': '/usr/lib/os-release', 'name': 'ClearLinux'},
        {'path': '/etc/coreos/update.conf', 'name': 'Coreos'},
        {'path': '/etc/flatcar/update.conf', 'name': 'Flatcar'},
        {'path': '/etc/os-release', 'name': 'NA'},
    )
    SEARCH_STRING = {
        'OracleLinux': 'Oracle Linux',
        'RedHat': 'Red Hat',
        'Altlinux': 'ALT',
        'SMGL': 'Source Mage GNU/Linux',
    }
    
    
    
    OS_RELEASE_ALIAS = {
        'Archlinux': 'Arch Linux'
    }
    STRIP_QUOTES = r'\'\"\\'
    def __init__(self, module):