Revert auto-increment expression evaluation to standard approach

This reverts the PeekNextAutoIncrementValue approach in favor of fixing
the real issue at the storage layer where auto-increment counter
advancement was being done incorrectly.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: elianddb

sql/expression/auto_increment.go

@@ -128,16 +128,11 @@ func (i *AutoIncrement) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)
 		given = nil
 	}
 
-	// Update integrator AUTO_INCREMENT sequence with our value
 	seq, err := i.autoTbl.GetNextAutoIncrementValue(ctx, given)
 	if err != nil {
 		return nil, err
 	}
-
-	// Use sequence value if NULL or 0 were provided
-	if given == nil {
-		given = seq
-	}
+	given = seq
 
 	ret, _, err := i.Type().Convert(ctx, given)
 	if err != nil {