Automatic merge from submit-queue

Allow Partial Success for ImageGC

Fixes #44951.  When the eviction manager is under disk pressure, it first attempts to reclaim disk space by deleting images.  However, if there are any errors during the image deletion process, the eviction manager treats that as a failed attempt delete images--even if some were successfully deleted.

This change essentially makes the eviction manager ignore errors during image garbage collection, and instead rely solely on the quantity of resources reclaimed.  If image deletion completely fails, for example, then this should still work as it would return 0 bytes freed.  This allows for partial success, because any resources freed are counted, regardless of if some images fail to be deleted, for example.

This does not require any changes to the image manager, as the current behavior is already to return the disk space freed along with any errors.

```release-note
Fixes a bug where pods were evicted even after images are successfully deleted.
```

cc @dchen1107 @vishh @kubernetes/kubernetes-release-managers

note to reviewers: this is mostly whitespace changes, so it will make more sense in reviewable