Description of problem:

Following the cancellation of an 'import' task, a Capsule sync task got released (it had been pending). When I realized what had happened (the sync task was still at 0% progress), I clicked 'Cancel' in the UI.

12 hours later, the Capsule Sync task was at 12%, showing a single 'Task canceled' and stuck at 12% for several hours. I had to go into the dnyflow console of the stuck Capsule sync task, 'cancel' a sub-task which had been in state waiting and the overall Capsule sync resumed and reached 14%.

I think cliking 'cancel' in the UI for a capsule sync task should cancel all of the sub-tasks and not leave a huge 'complete sync' stuck for hours.

Version-Release number of selected component (if applicable):

[root@w0617ialabrhsat01 foreman]# rpm -qa satellite*
satellite-installer-6.12.0.5-1.el8sat.noarch
satellite-maintain-0.0.1-1.el8sat.noarch
satellite-cli-6.12.4-1.el8sat.noarch
satellite-common-6.12.4-1.el8sat.noarch
satellite-6.12.4-1.el8sat.noarch

Steps to Reproduce:
1. start a complete sync to a capsule
2. click cancel in the UI for the above task
3. watch what happens