max prefixes count

[sh-shamsan]

Description

make MAX_PREFIXES_COUNT configurable via session properties and config.properties. This helps improve performance of SHOW QUERY

Motivation and Context

Impact

Test Plan

UTs

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• Documented new properties (with its default value), SQL syntax, functions, or other functionality.
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Release Notes

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== RELEASE NOTES ==

General Changes
* Add configuration property ``max-prefixes-count``