[4.1] Fix Permissions for Manually Running Scheduled Tasks

[ditsuke]

Pull Request for Issue #36677.

Summary of Changes

• [x] Explicitly disables the "run task" button on insufficient authorization.
• [x] Adds tooltip to give context on disabling the button.
• [ ] Change default permission level for running tasks/grant access to creator.
• [ ] Prevent manual runs from being publicly accessible regardless of permission levels. Ref: #36453#issuecomment-1001793962 / @PhilETaylor

Testing Instructions

• Create a new task with an admin (not superuser) account.
• Try to run it from the Scheduled tasks manager.

Actual result BEFORE applying this Pull Request

There is no indication that the user is not authorized to run the task. The button is usable.

Expected result AFTER applying this Pull Request

The button is disabled. Reason for being disabled is available through a tooltip on hover.

Documentation Changes Required

N/A

[brianteeman]

How can it make sense for a user to be able to create a new task and setup lazy loading etc but not be able to run the task directly

[ditsuke]

How can it make sense for a user to be able to create a new task and setup lazy loading etc but not be able to run the task directly

Definitely, now that I think of it the creator should be able to run them manually as a default. I'll work on enabling that behavior before opening this PR.

[brianteeman]

Possibly need a new permission for that "Edit own"

[HLeithner]

This pull request has automatically rebased to 4.2-dev.

[HLeithner]

This pull request has been automatically rebased to 4.3-dev.

[HLeithner]

This pull request has been automatically rebased to 4.4-dev.