Treat Low Confidence, 0 estimations as unknown during joins

[abhinavmuk04]

Description

Treat Low Confidence, 0 estimations as unknown during joins

Motivation and Context

When a node has a low confidence and a 0 estimation it is likely due to the fact that there has been multiple filters pushed down on it. Additionally, sometimes this estimation can actually be so incorrect that it can have us broadcasting the wrong side entirely leading to a failed query. This will help us avoid this.

Impact

This can result in faster query execution times and improved overall performance.

Test Plan

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• Documented new properties (with its default value), SQL syntax, functions, or other functionality.
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• Adequate tests were added if applicable.
• CI passed.

Release Notes

== NO RELEASE NOTE ==