Backport of Fix task leak during client restore when allocrunner prerun hook fails into release/1.5.x #17121
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Backport
This PR is auto-generated from #17104 to be assessed for backporting due to the inclusion of the label backport/1.5.x.
The below text is copied from the body of the original PR.
Fixes #17102 -- I describe the issue more fully there.
My approach here is to stop skipping over
allocRunner.runTasks()on prerun error. That way, instead of duplicating more cleanup code, which may change in the future, the sameTaskRunner.Run()code that usually handles task cleanup can do what it needs to as appropriate with tasks that fail prerun during the alloc restore process.In pursuit of that, I made an error-inducing
FailHookand added the ability to include it as part of client Config for the client integration test. I could remove the non-Prerun interface implementations, but I figured while I'm at it, may as well make a thing that can be induced to fail at any stage in case it's useful?