feat: Change ansible pull module type from dict to list

[shaerpour]

Proposed Commit Message

feat: Change ansible pull module type from dict to list

Change ansible pull module to list so it can run 
multiple playbooks like setup_controller module.

Additional Context

Test Steps

Merge type

• Squash merge using "Proposed Commit Message"
• Rebase and merge unique commits. Requires commit messages per-commit each referencing the pull request number (#<PR_NUM>)

Fixes GH-4566

[holmanb]

Hi @shaerpour, thanks for this proposal! It looks pretty good, but there's one big thing we need to address. If we shipped a new version of cloud-init with this feature it would break everybody that is currently using the old non-array version. Can you please modify this PR to support the old format as well?

[shaerpour]

Dear @holmanb.
Absolutely! I will work on backward compatibility of this PR and update ASAP. Thank you for mentioning.