Add notification templates option assign option to organization role

[Tompage1994]

What does this PR do?

• Add assign_notification_templates_to_org option to organization role to allow conditional assigning of notification templates
• Updated dispatch role with assign_notification_templates_to_org option assigned to organization as False on first run and True on second run by default.
• Updated the arg_spec for dispatch to reflect the current truth

How should this be tested?

I've updated CI to test for this and also test for galaxy credential assigning. Added this test case:

  - name: Test-dispatch-dependencies
    galaxy_credentials:
      - galaxy-server
    notification_templates_approvals:
      - Email notification

Is there a relevant Issue open for this?

resolves #765

Other Relevant info, PRs, etc

N/A

[djdanielsson]

LGTM

[jon4hz]

Thanks a lot for implementing this!