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GH-34106: [C++][Parquet] Fix updating page stats for WriteArrowDictionary (#34107)

### Rationale for this change

`ColumnWriter::WriteArrowDictionary` has tried to update stats but has problem if a single write has been split into batches and more than one page is written.

### What changes are included in this PR?

Make sure every write of batch has updated the stats.

### Are these changes tested?

Add test case which fails without the fix.

### Are there any user-facing changes?

No.
* Closes: #34106

Authored-by: Gang Wu <ustcwg@gmail.com>
Signed-off-by: Will Jones <willjones127@gmail.com>