Support for builder lxd in combination with ansible

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#### Description

The combination of builder type `lxd` is not working with provisioner `ansible`.

The work around is to user the `ansible-local` provisioner, but then you need to install the `ansible` package in the container before being able to run the ansible stuff.

#### Use Case(s)

Create preconfigured LXC images, as you can do for other builder types.

#### Potential configuration

```
{
"builders": [
{
"type": "lxd",
"name": "lxd-focal",
"image": "ubuntu:focal",
"output_image": "focal-apache2",
"publish_properties": {
"description": "Trivial repackage ubuntu:focal with Packer"
}
}
],
"provisioners": [
{
"type": "ansible",
"playbook_file": "./install-apache.yaml"
}
]
}
```

The workaround is to use `ansible-local`, as follows:
```
{
"builders": [
{
"type": "lxd",
"name": "lxd-focal",
"image": "ubuntu:focal",
"output_image": "focal-apache2",
"publish_properties": {
"description": "Trivial repackage ubuntu:focal with Packer"
}
}
],
"provisioners": [
{
"type": "shell",
"inline": ["apt update"]
},
{
"type": "shell",
"inline": ["apt install -y ansible"]
},
{
"type": "ansible-local",
"playbook_file": "./install-apache.yaml"
}
]
}
```

The ansible playbook for this example:
```
---
- name: 'Provision Image With Apache2'
hosts: localhost

tasks:
- name: Install Apache2
ansible.builtin.apt:
name: apache2
state: present
```
#### Potential References

There is a great video by Stéphane Graber on youtube explaining how LXD and Ansible work together. Search for "LXD and Ansible".

The issue identifies the LXD builder and Ansible provisioner as the integration points; start by locating how provisioners connect to the builder and reproduce the provided configuration. Done means the configuration provisions an LXD image with Ansible directly, without installing Ansible inside the container, with coverage for this combination.

Written by the indexing model from the issue text.