Merge 'Fix column order for multi-row insertion' from Nikita Sivukhin

Column order handled incorrectly for multi-rows insert case
```sql
turso> CREATE TABLE t(x, y, z);
turso> INSERT INTO t(z, x) VALUES (1, 2), (3, 4);
turso> SELECT * FROM t;
┌───┬───┬───┐
│ x │ y │ z │
├───┼───┼───┤
│   │ 2 │   │
├───┼───┼───┤
│   │ 4 │   │
└───┴───┴───┘
```

Closes #2109

core/translate/insert.rs

@@ -787,36 +787,29 @@ fn resolve_indicies_for_insert(
 
 fn populate_columns_multiple_rows(
     program: &mut ProgramBuilder,
-    column_mappings: &[ColumnMapping],
+    column_mappings: &[ColumnMapping], // columns in order of table definition
     column_registers_start: usize,
     yield_reg: usize,
     resolver: &Resolver,
     temp_table_ctx: &Option<TempTableCtx>,
 ) -> Result<()> {
-    let mut value_index_seen = 0;
-    let mut other_values_seen = 0;
     for (i, mapping) in column_mappings.iter().enumerate() {
         let target_reg = column_registers_start + i;
 
-        other_values_seen += 1;
         if let Some(value_index) = mapping.value_index {
-            // Decrement as we have now seen a value index instead
-            other_values_seen -= 1;
             if let Some(temp_table_ctx) = temp_table_ctx {
                 program.emit_column(
                     temp_table_ctx.cursor_id,
-                    value_index_seen,
+                    value_index,
                     column_registers_start + i,
                 );
             } else {
                 program.emit_insn(Insn::Copy {
-                    src_reg: yield_reg + value_index_seen,
-                    dst_reg: column_registers_start + value_index + other_values_seen,
+                    src_reg: yield_reg + value_index,
+                    dst_reg: column_registers_start + i,
                     extra_amount: 0,
                 });
             }
-
-            value_index_seen += 1;
         } else if mapping.column.is_rowid_alias {
             program.emit_insn(Insn::SoftNull { reg: target_reg });
         } else if let Some(default_expr) = mapping.default_value {

testing/insert.test

@@ -458,3 +458,26 @@ do_execsql_test_skip_lines_on_specific_db 1 {:memory:} double-quote-inner-quotes
     SELECT id, content FROM inner_quotes_test ORDER BY id;
 } {1|"foo"
 2|'bar'}
+
+# regression test for incorrect order of column in insert
+do_execsql_test_on_specific_db {:memory:} insert-tricky-column-order-values {
+    create table t(x, y, z);
+    insert into t(z, x) values (1, 2), (3, 4);
+    insert into t(y, z) values (5, 6), (7, 8);
+    select * from t;
+} {2||1
+4||3
+|5|6
+|7|8}
+
+do_execsql_test_on_specific_db {:memory:} insert-tricky-column-order-table {
+    create table t(x, y, z);
+    create table q(x, y, z);
+    insert into q values (1, 2, 3), (4, 5, 6);
+    insert into t(z, x) select y, x from q;
+    insert into t(y, z) select z, y from q;
+    select * from t;
+} {1||2
+4||5
+|3|2
+|6|5}