Add support for nomad job input variables

[Freddo3000]

Summary

Nomad supports input variables to jobs via either environment variables, input files, or passed as arguments as seen in the documentation. This allows better input validation compared to simply templating it in via Ansible as well as some other logic that comes with HCL, such as functions and dynamic blocks.

Issue Type

Feature Idea

Component Name

nomad_job

Additional Information

- name: Start nomad job with input file
  community.general.nomad_job:
    host: <host>
    content: "{{ lookup('ansible.builtin.file', 'job.hcl') }}"
    input_vars: "{{ lookup('ansible.builtin.file', 'vars.hcl') }}" # Could be JSON as well, perhaps even just a straight up YAML object?
    state: present
    use_ssl: false
    validate_certs: false

or via environment variables:

- name: Start nomad job with input file
  community.general.nomad_job:
    host: <host>
    content: "{{ lookup('ansible.builtin.file', 'job.hcl') }}"
    state: present
    use_ssl: false
    validate_certs: false
  environment:
    NOMAD_VAR_myvar: "Hello There!"

I've tried the environment variable option but it seems to get ignored, as I would assume python-nomad doesn't support it.

Code of Conduct

• I agree to follow the Ansible Code of Conduct

[ansibullbot]

Files identified in the description:

• plugins/modules/nomad_job.py

If these files are incorrect, please update the component name section of the description or use the !component bot command.

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[ansibullbot]

cc @apecnascimento @chris93111
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