Automatic merge from submit-queue (batch tested with PRs 48118, 48159)

Ensures node becomes schedulable at the end of tests that delete nodes

**What this PR does / why we need it**: Further fixes the flakiness of "Pod Disk should be able to detach from a node which was deleted". When a node becomes ready but not schedulable, it was not included in the final node count.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #48008 

**Special notes for your reviewer**: Updated a similar test, "Pod Disk should be able to detach from a node whose api object was deleted", to use an "Expect" instead of a soft error because the test needs to guarantee that the environment is *completely* reset.

**Release note**:

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