SNOW-1657238: Fix incorrect row count for rows loaded

[sfc-gh-ext-simba-lf]

Description

Fix incorrect row count when executing a COPY INTO command for ExecuteNonQuery and ExecuteNonQueryAsync

Checklist

• [ ] Code compiles correctly
• [ ] Code is formatted according to Coding Conventions
• [ ] Created tests which fail without the change (if possible)
• [ ] All tests passing (dotnet test)
• [ ] Extended the README / documentation, if necessary
• [ ] Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.22%. Comparing base (8199563) to head (3acb01f).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1044 +/- ## ========================================== + Coverage 86.14% 86.22% +0.07% ========================================== Files 120 120 Lines 11627 11629 +2 Branches 1165 1167 +2 ========================================== + Hits 10016 10027 +11 + Misses 1328 1320 -8 + Partials 283 282 -1 ```

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