OperatorStats overflow fix

[natashasehgal]

Description

In OperatorStats, summing long types leads to overflow. Use double type to do calculation.
If final result is larger than Long.MAX_VALUE, return Long.MAX_VALUE.

Motivation and Context

This fix was originally made in March 2024 and accidentally reverted on March 2025
Fix: #22230
Revert of fix:
#24414
#24750

Impact

Test Plan

• Unit tests

Contributor checklist

• Please make sure your submission complies with our contributing guide, in particular code style and commit standards.
• PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
• 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 ==

[shangm2]

Thanks for fixing this.