Flush-ContainerHelperCache Deletes Images that Are Currently In Use

[MattTraxinger]

Describe the issue
Flush-ContainerHelperCache is deleting images in the middle of pipelines.

Pipeline 1

Pipeline 2

I'm guessing this is because the function isn't taking the new URLs into account.

If I'm running two pipelines simultaneously, one can finish and delete the image while the other still needs it.

Scripts used to create container and cause the issue
Flush-ContainerHelperCache -KeepDays 2

Additional context
This failed with the release today.

[freddydk]

It calculates the cachefolder wrongly - 6.0.14 will ship asap