Adding molecule template based on driver.name

[mrbrandao]

In past when using cookicuter some molecule templates where straight forward to use delegated container drivers, such as podman and docker. Since it was gone, every time a new scenario is created it's needed to configure the templates again, by adding the image and the driver, also cleaning the files that will not be used by default such as create.yml and destroy.yml

If we can just init the scenario with a basic template that just works as we had in version 5 would be great.

Here I'm bringing back some of this functionality, e.g:

ansible-galaxy collection init foo.example
cd foo/example/roles
ansible-galaxy role init bar
cd bar
molecule init scenario -d podman podman

This will create a molecule.yml as the following:

---
driver:
  name: podman
platforms:
  - name: instance
    image: quay.io/centos/centos:stream8
    pre_build_image: true

it will also create the molecule scenario with just the molecule.yml and the converge.yml. e.g:

tree ./molecule/podman/
./molecule/podman/
├── converge.yml
└── molecule.yml

If the scenario was any driver different than podman, docker or containers it will create the scenario with all the default templates from the current data structure, e.g:

molecule init scenario
tree ./molecule/
./molecule/
├── default
│   ├── converge.yml
│   ├── create.yml
│   ├── destroy.yml
│   └── molecule.yml

The final scenario tree, after the commands molecule init scenario -d podman podman and molecule init scenario will look like:

tree ./molecule/
./molecule/
├── default
│   ├── converge.yml
│   ├── create.yml
│   ├── destroy.yml
│   └── molecule.yml
└── podman
    ├── converge.yml
    └── molecule.yml

Fixes: #4128