fix: preserve InsertStmt override field instead of removing it

- Remove override field deletion logic that was causing regressions
- Tests expect override field to be preserved, not removed
- Addresses updatable_views and rangetypes test failures
- Should restore pass rate from 54 back to previous 78+ passing tests

Co-Authored-By: Dan Lynch <[email protected]>

Author: devin-ai-integration[bot]

packages/transform/src/transformers/v13-to-v14.ts

@@ -173,9 +173,7 @@ export class V13ToV14Transformer {
   InsertStmt(node: PG13.InsertStmt, context: TransformerContext): any {
     const result: any = { ...node };
 
-    if (result.override === 'OVERRIDING_NOT_SET') {
-      delete result.override;
-    }
+
 
     if (result.relation !== undefined) {
       result.relation = this.transform(result.relation, context);