### Summary

 ansible [core 2.13.0.dev0] is giving wrong `discovered_interpreter_python`. Here is a comparison from same host for 2.12.1 and 2.13

```
[root@perfscale-jenkins-max-control-11-exec-controlplane-1-vsi ansible-tower-setup]# ansible --version
[WARNING]: You are running the development version of Ansible. You should only run Ansible from "devel" if you are modifying the Ansible engine, or trying out features under development. This is a rapidly
changing source of code and can become unstable at any point.
ansible [core 2.13.0.dev0]
  config file = /root/ansible-tower-setup/ansible.cfg
  configured module search path = ['/root/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.9/site-packages/ansible
  ansible collection location = /root/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/bin/ansible
  python version = 3.9.2 (default, Mar  5 2021, 01:49:45) [GCC 8.4.1 20200928 (Red Hat 8.4.1-1)]
  jinja version = 3.0.3
  libyaml = True
[root@perfscale-jenkins-max-control-11-exec-controlplane-1-vsi ansible-tower-setup]# ansible -i inventory.cluster automationcontroller -m setup | grep -i discovered_interpreter_python
[WARNING]: You are running the development version of Ansible. You should only
run Ansible from "devel" if you are modifying the Ansible engine, or trying out
features under development. This is a rapidly changing source of code and can
become unstable at any point.
[WARNING]: Platform linux on host xx.xx.xx.xx is using the discovered
Python interpreter at /usr/bin/python3.9, but future installation of another
Python interpreter could change the meaning of that path. See
https://docs.ansible.com/ansible-
core/devel/reference_appendices/interpreter_discovery.html for more
information.
        "discovered_interpreter_python": "/usr/bin/python3.9",
```

In 2.12.1

```
[root@perfscale-jenkins-max-control-11-exec-controlplane-1-vsi ansible-tower-setup]# ansible --version
ansible [core 2.12.1]
  config file = /root/ansible-tower-setup/ansible.cfg
  configured module search path = ['/root/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.8/site-packages/ansible
  ansible collection location = /root/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/bin/ansible
  python version = 3.8.6 (default, Jan 22 2021, 11:41:28) [GCC 8.4.1 20200928 (Red Hat 8.4.1-1)]
  jinja version = 2.10.3
  libyaml = True
[root@perfscale-jenkins-max-control-11-exec-controlplane-1-vsi ansible-tower-setup]# ansible -i inventory.cluster automationcontroller -m setup | grep -i discovered_interpreter_python
        "discovered_interpreter_python": "/usr/libexec/platform-python",
```

### Issue Type

Bug Report

### Component Name

setup

### Ansible Version

```console
$ ansible --version
ansible [core 2.13.0.dev0]
  config file = /root/ansible-tower-setup/ansible.cfg
  configured module search path = ['/root/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.9/site-packages/ansible
  ansible collection location = /root/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/bin/ansible
  python version = 3.9.2 (default, Mar  5 2021, 01:49:45) [GCC 8.4.1 20200928 (Red Hat 8.4.1-1)]
  jinja version = 3.0.3
  libyaml = True
```


### Configuration

```console
$ ansible-config dump --only-changed
```


### OS / Environment

RHEL 8.4

### Steps to Reproduce

<!--- Paste example playbooks or commands between quotes below -->
```
Try to run the setup module and look for `discovered_interpreter_python`

```


### Expected Results
```console
"discovered_interpreter_python": "/usr/libexec/platform-python"
```
### Actual Results

```console
"discovered_interpreter_python": "/usr/bin/python3.9"
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
OS_FAMILY_MAP = {'RedHat': ['RedHat', 'Fedora', 'CentOS', 'Scientific', 'SLC',
                                'Ascendos', 'CloudLinux', 'PSBM', 'OracleLinux', 'OVS',
                                'OEL', 'Amazon', 'Virtuozzo', 'XenServer', 'Alibaba',
                                'EulerOS', 'openEuler', 'AlmaLinux', 'Rocky', 'TencentOS',
                                'EuroLinux'],
                     'Debian': ['Debian', 'Ubuntu', 'Raspbian', 'Neon', 'KDE neon',
                                'Linux Mint', 'SteamOS', 'Devuan', 'Kali', 'Cumulus Linux',
                                'Pop!_OS', 'Parrot', 'Pardus GNU/Linux', 'Uos', 'Deepin'],
                     'Suse': ['SuSE', 'SLES', 'SLED', 'openSUSE', 'openSUSE Tumbleweed',
                              'SLES_SAP', 'SUSE_LINUX', 'openSUSE Leap'],
                     'Archlinux': ['Archlinux', 'Antergos', 'Manjaro'],
                     'Mandrake': ['Mandrake', 'Mandriva'],
                     'Solaris': ['Solaris', 'Nexenta', 'OmniOS', 'OpenIndiana', 'SmartOS'],
                     'Slackware': ['Slackware'],
                     'Altlinux': ['Altlinux'],
                     'SGML': ['SGML'],
                     'Gentoo': ['Gentoo', 'Funtoo'],
                     'Alpine': ['Alpine'],
                     'AIX': ['AIX'],
                     'HP-UX': ['HPUX'],
                     'Darwin': ['MacOSX'],
                     'FreeBSD': ['FreeBSD', 'TrueOS'],
                     'ClearLinux': ['Clear Linux OS', 'Clear Linux Mix'],
                     'DragonFly': ['DragonflyBSD', 'DragonFlyBSD', 'Gentoo/DragonflyBSD', 'Gentoo/DragonFlyBSD'],
                     'NetBSD': ['NetBSD'], }
    OS_FAMILY = {}
    for family, names in OS_FAMILY_MAP.items():
        for name in names:
            OS_FAMILY[name] = family
    def __init__(self, module):