Improve TaskInstance and DagRun actions UX

[bbovenzi]

Problems with current UX:

• Actions and their options take up a lot of real estate on the screen
• Actions use webserver endpoints and not the REST API
• You can only access actions from the details panel of grid view, but not the Logs or Graph tabs.
• Actions options can be confusing. What does recursive mean?
• Not all actions are relevant on every Task Instance or Dag run. No need to mark success on a successful dag run, no need to queue new tasks instances when there are no new tasks.
• Confirmation modal is a giant text dump, provides little context

Solution:

• Action buttons available from all relevant dag run and task instance tab panels
• Button will open a modal with options (or not, if there is nothing to confirm then just do the action)
• Disable irrelevant actions
• Improve copy and confirmation