### Summary

When running the builtin `known_hosts` module without a `path` argument (thus defaulting to `~/.ssh/known_hosts`), it will fail when `~/.ssh/` does not exist.

https://github.com/ansible/awx/issues/10984

### Issue Type

Documentation Report

### Component Name

known_hosts

### Ansible Version

```console
$ ansible --version
ansible [core 2.12.0.dev0]
  config file = None
  configured module search path = ['/home/runner/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.8/site-packages/ansible
  ansible collection location = /home/runner/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/bin/ansible
  python version = 3.8.6 (default, Jan 29 2021, 17:38:16) [GCC 8.4.1 20200928 (Red Hat 8.4.1-1)]
  jinja version = 2.10.3
  libyaml = True
```


### Configuration

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


### OS / Environment

Docker image quay.io/ansible/awx-ee:latest (Image id 139d0f567124 )

### Steps to Reproduce

<!--- Paste example playbooks or commands between quotes below -->
```sh
bash-4.4$ ansible localhost -m known_hosts -a 'name=example.com key="example.com ssh-rsa test"'
```


### Expected Results

Success & the given key in a new `~/.ssh/known_hosts`

### Actual Results

```console
localhost | FAILED! => {
    "changed": false,
    "msg": "Failed to write to file /home/runner/.ssh/known_hosts: [Errno 2] No such file or directory: '/home/runner/.ssh/tmpkqkq1oke'"
}
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
- name: Tell the host about our servers it might want to ssh to
  known_hosts:
    path: /etc/ssh/ssh_known_hosts
    name: foo.com.invalid
    key: "{{ lookup('file', 'pubkeys/foo.com.invalid') }}"
- name: Another way to call known_hosts
  known_hosts:
    name: host1.example.com   # or 10.9.8.77
    key: host1.example.com,10.9.8.77 ssh-rsa ASDeararAIUHI324324  # some key gibberish
    path: /etc/ssh/ssh_known_hosts
    state: present
- name: Add host with custom SSH port
  known_hosts:
    name: '[host1.example.com]:2222'
    key: '[host1.example.com]:2222 ssh-rsa ASDeararAIUHI324324' # some key gibberish
    path: /etc/ssh/ssh_known_hosts
    state: present
'''
#
import base64
import errno
import hashlib
import hmac
import os
import os.path
import re
import tempfile
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_bytes, to_native
def enforce_state(module, params):