[SPARK-48190][PYTHON][PS][TESTS] Introduce a helper function to drop metadata #46466
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What changes were proposed in this pull request?
Introduce a helper function to drop metadata
Why are the changes needed?
existing helper function
remove_metadata
in PS doesn't support nested types, so cannot be reused in other placesDoes this PR introduce any user-facing change?
no, test only
How was this patch tested?
ci
Was this patch authored or co-authored using generative AI tooling?
no