##### SUMMARY
Delegating a task to another host that uses a different Python interpreter always fails.  This was reported previously (#61002, #63180), but the fix (#64906) does not seem to have resolved the issue.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
discovered_interpreter_python

##### ANSIBLE VERSION
```
ansible 2.9.9
  config file = None
  configured module search path = ['/home/dhatch/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/dhatch/.local/lib/python3.8/site-packages/ansible
  executable location = /home/dhatch/.local/bin/ansible
  python version = 3.8.2 (default, Feb 28 2020, 00:00:00) [GCC 10.0.1 20200216 (Red Hat 10.0.1-0.8)]
```

##### CONFIGURATION
```
```

##### OS / ENVIRONMENT
Control machine: Ansible 2.9.9 on Fedora 32
Host A: CentOS 8
Host B (delegation target): CentOS 7

##### STEPS TO REPRODUCE
This playbook shows that delegating a task to the CentOS 7 machine does not work when the task host is CentOS 8:
```yaml
- hosts: all
  tasks:
  - meta: clear_facts
- hosts: all
  gather_facts: true
  tasks:
  - debug:
      var: discovered_interpreter_python
  - command: 'true'

- hosts: centos-8-host
  tasks:
  - command: 'true'
    delegate_to: centos-7-host
    ignore_errors: true
  
- hosts: centos-8-host
  tasks:
  - command: 'true'
    delegate_to: centos-7-host
    delegate_facts: false
    ignore_errors: true
```

##### EXPECTED RESULTS
The Python interpreter used on the delegation target should be the one discovered for that host, NOT the host of the task itself.


##### ACTUAL RESULTS
```paste below
PLAY [all] *************************************************************************************************************************************

TASK [Gathering Facts] *************************************************************************************************************************
ok: [centos-7-host]
ok: [centos-8-host]

PLAY [all] *************************************************************************************************************************************

TASK [Gathering Facts] *************************************************************************************************************************
ok: [centos-7-host]
ok: [centos-8-host]

TASK [debug] ***********************************************************************************************************************************
ok: [centos-8-host] => {
    "discovered_interpreter_python": "/usr/libexec/platform-python"
}
ok: [centos-7-host] => {
    "discovered_interpreter_python": "/usr/bin/python"
}

TASK [command] *********************************************************************************************************************************
changed: [centos-7-host]
changed: [centos-8-host]

PLAY [centos-8-host] *********************************************************************************************************

TASK [Gathering Facts] *************************************************************************************************************************
ok: [centos-8-host]

TASK [command] *********************************************************************************************************************************
fatal: [centos-8-host -> centos-7-host]: FAILED! => {"changed": false, "module_stderr": "Shared connection to centos-7-host closed.\r\n", "module_stdout": "/bin/sh: /usr/libexec/platform-python: No such file or directory\r\n", "msg": "The module failed to execute correctly, you probably need to set the interpreter.\nSee stdout/stderr for the exact error", "rc": 127}
...ignoring

PLAY [centos-8-host] *********************************************************************************************************

TASK [Gathering Facts] *************************************************************************************************************************
ok: [centos-8-host]

TASK [command] *********************************************************************************************************************************
fatal: [centos-8-host -> centos-7-host]: FAILED! => {"changed": false, "module_stderr": "Shared connection to centos-7-host closed.\r\n", "module_stdout": "/bin/sh: /usr/libexec/platform-python: No such file or directory\r\n", "msg": "The module failed to execute correctly, you probably need to set the interpreter.\nSee stdout/stderr for the exact error", "rc": 127}
...ignoring

PLAY RECAP *************************************************************************************************************************************
centos-8-host : ok=8    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=2
centos-7-host : ok=4    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

```

data['stdout_lines'] = txt.splitlines()
        if 'stderr' in data and 'stderr_lines' not in data:
            
            txt = data.get('stderr', None) or u''
            data['stderr_lines'] = txt.splitlines()
        
        if self._discovered_interpreter_key:
            if data.get('ansible_facts') is None:
                data['ansible_facts'] = {}
            data['ansible_facts'][self._discovered_interpreter_key] = self._discovered_interpreter
        if self._discovery_warnings:
            if data.get('warnings') is None:
                data['warnings'] = []
            data['warnings'].extend(self._discovery_warnings)
        if self._discovery_deprecation_warnings:
            if data.get('deprecations') is None:
                data['deprecations'] = []
            data['deprecations'].extend(self._discovery_deprecation_warnings)
        
        
        data = wrap_var(data)
        display.debug("done with _execute_module (%s, %s)" % (module_name, module_args))
        return data
    def _parse_returned_data(self, res):
        try:
            filtered_output, warnings = _filter_non_json_lines(res.get('stdout', u''))
            for w in warnings:
                display.warning(w)
            data = json.loads(filtered_output)
            data['_ansible_parsed'] = True