[DEVOPS-640] Add wait for mutation action

[yusufhm]

This allows us to do things like this directly in a playbook:

- name: Invoke PaaS audit Lagoon task
  lagoon.api.mutation:
    mutation: invokeRegisteredTask
    arguments:
      advancedTaskDefinition: 951
      environment: 322422
      argumentValues:
        - advancedTaskDefinitionArgumentName: SHIPSHAPE_AUDIT_NAME
          value: PAAS
    wait: true
  vars:
    lagoon_api_token: "{{ token.token }}"

[steveworley]

Can we fix the tests before merging this one?