[SPARK-42307][SQL][BUILD][DOCS] Adding in a better name for `_LEGACY_ERROR_TEMP_2232`

[hannahkamundson]

What changes were proposed in this pull request?

This adds a better name for the error type _LEGACY_ERROR_TEMP_2232 and updates the messages for it.

Why are the changes needed?

All that was changed was the

• name for _LEGACY_ERROR_TEMP_2232 to NULL_ROW_VALUE
• sqlState for _LEGACY_ERROR_TEMP_2232
• message for _LEGACY_ERROR_TEMP_2232

Does this PR introduce any user-facing change?

Yes.

• It updates the sqlState for _LEGACY_ERROR_TEMP_2232 to 2200E whereas it was previously empty.
• It updates the message for _LEGACY_ERROR_TEMP_2232 from Value at index <index> is null. to Row value at the position <index> is NULL.

How was this patch tested?

Unit tests

Was this patch authored or co-authored using generative AI tooling?

No

[MaxGekk]

@hannahkamundson Could you add a test for the error class, please.

[hannahkamundson]

@MaxGekk Let me know what you think!

[hannahkamundson]

@MaxGekk Any thoughts?

[hannahkamundson]

@MaxGekk Rebased on master. I can make the changes above. I just need a little more guidance :)

[github-actions[bot]]

We're closing this PR because it hasn't been updated in a while. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable. If you'd like to revive this PR, please reopen it and ask a committer to remove the Stale tag!