[SPARK-33480][SQL][FOLLOWUP] do not expose user data in error message #30653
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What changes were proposed in this pull request?
This is a followup of #30412. This PR updates the error message of char/varchar table insertion length check, to not expose user data.
Why are the changes needed?
This is risky to expose user data in the error message, especially the string data, as it may contain sensitive data.
Does this PR introduce any user-facing change?
no
How was this patch tested?
updated tests