Task: Set up an environment to push package doc builds

[oraNod]

Required for ansible/ansible-documentation#1353 Blocked by #525

The purpose of this issue is to create an environment in the ansible-documentation repo that holds secrets for the GitHub app with read/write permissions to the contents of the destination repo in the ansible-community org. This is needed to push resources from the ansible-documentation repo to the destination repo that builds on ReadTheDocs.

As Sviat mentioned in the PR, we can also use a deployment key. It's public part is added to the target repo and the private one goes to this repo's secrets.

Additionally, we should restrict access to the deploy job in the workflow to members of the community-docs-maintainers group. The environment should be configured so that members of that group control when the job runs.

[oraNod]

When the environment is created, specify it in the workflow: https://github.com/ansible/ansible-documentation/pull/1353/files#diff-556c4624ec829c57c68bca98085f1fac2a96f6af1ff4dc3c42e4a8f20e2a10abR131

[oraNod]

Closing as we can actually specify the environment in the workflow and it will be created when merged. https://github.com/ansible/ansible-documentation/pull/1353/files#diff-556c4624ec829c57c68bca98085f1fac2a96f6af1ff4dc3c42e4a8f20e2a10abR145