Remove unneeded lambda_stmt in place add in statistics

[bdraco]

Proposed change

We can generate this entire query in a single lambda_stmt so there is no need to add two which increases the size of the cache key

Type of change

• [ ] Dependency upgrade
• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New integration (thank you!)
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• [ ] Deprecation (breaking change to happen in the future)
• [ ] Breaking change (fix/feature causing existing functionality to break)
• [x] Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
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Checklist

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