How can I pause the running task and later resume it or retry the failed task even if it exceed the Retry times？

[NEUerYZY]

When I use Tekton v0.25.0 , I met some scenes in actual use.
scene 1 : I make up a Pipeline with several Task , one of the Pipeline's Task runs failed . I do not want to replay the succeed Task , only want to restart the failed Task.
I know Tekton has a feature with keyboard retry which can retry the failed Task. But we still met a problem that if the Task's failure time exceed the retry time I set , how can I restart the Task without replay the former succeed Task？

scene 2 ：I make up a Pipeline with several Task , when the Pipeline runs to a Task，out of some reason , I want's to pause the Task to do some manual intervention operation after that I want to continue the Pipeline to go on the following Task .
For example , Before I execute automated testing , I must deploy my service and the service must be available . I want to pause the Pipeline until the Deployed service is available ，and then I send a signal to resume the Pipeline's running ， so that the automated testing Task can get correct results.

Is there any solution to resolve the scene I mentioned above?
Hope for help, Thanks a lot