Clean up pod drop alpha fields test description

[verb]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

This cleans up test incorrect test descriptions that weren't updated after copy/paste from a different test.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

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[verb]

/sig node

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[verb]

I cherry-picked this into #99023 since it has the same reviewers to reduce the number of reviews