custom INT to STRING casters

[joocer]

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Fixes: #2726

Please replace <issue_number_goes_here> with the corresponding issue number.

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[github-actions]

📦 Opteryx build version: 0.25.0-beta.1432

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud