Turn on optimized_scale_writer_producer_buffer by default

[jaystarshot]

Description

Found out a case where there was skew under the stage which is writing. This resulted in slow writer.

2ab2543 Presto already has a similar fix which is off by default. Turning it on helps but query is still a bit slower than no skew since the writers are scaling slower than the no skew case

trinodb/trino@4ddcb9e Trino's fix makes more sense and maybe it can be incorporated later

Motivation and Context

Impact

Test Plan

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Release Notes

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== RELEASE NOTES ==

General Changes
* Improve writer scaling in skewed conditions by setting optimized_scale_writer_producer_buffer to on by default :pr:`23774`

[steveburnett]

Nit, suggest rephrasing release note entry to follow the Order of changes in the Release Notes Guidelines. From the PR description, maybe something like this? Please revise my suggestion if you have a better way to describe it.

== RELEASE NOTES ==

General Changes
* Improve query speed by setting ``optimized_scale_writer_producer_buffer`` to ``on`` by default :pr:`23774`

Also, I found the session property optimized_scale_writer_producer_buffer and the configuration property optimized-scale-writer-producer-buffer mentioned in the 0.234 Release Notes, but I didn't find either of these elsewhere in the documentation. Consider adding doc for these.