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GH-36319: [Go][Parquet] Improved row group writer error messages (#36320)



### Rationale for this change

### What changes are included in this PR?

Updated error messages for mismatched column row counts to help identify the column, or rowgroup index which failed the check, and how many rows were expected vs found.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.

* Closes: #36319

Authored-by: Mark Wolfe <mark@wolfe.id.au>
Signed-off-by: Matt Topol <zotthewizard@gmail.com>