Apollo MR pipelines - Migrate pipelines_manual_actions play to GraphQL mutation jobPlay

In app/assets/javascripts/pipelines/components/pipelines_list/pipelines_manual_actions.vue, we are still making a REST call when playing a manual job. This issue is to:

• Replace the axios call with the jobPlay mutation.
• Handle the loading state
• Handle the new emit pattern, ideally without the eventhub and with native Vue events instead.