Partially revert #117 (#118)

There's more nuance to the type of the returned value than #117
antitipated. With that PR in, WooCommerce wouldn't work:

```
[06-Jun-2024 16:21:26 UTC] PHP Fatal error:  Uncaught TypeError: get_object_vars(): Argument #1 ($object) must be of type object, string given in /wordpress/wp-includes/class-wpdb.php:3
Stack trace:
#0 /wordpress/wp-includes/class-wpdb.php(3): get_object_vars('wp_wc_product_a...')
#1 /wordpress/wp-content/plugins/woocommerce/src/Internal/ProductAttributesLookup/LookupDataStore.php(69): wpdb->get_var('SHOW TABLES LIK...')
#2 /wordpress/wp-content/plugins/woocommerce/src/Internal/ProductAttributesLookup/LookupDataStore.php(650): Automattic\WooCommerce\Internal\ProductAttributesLookup\LookupDataStore->check_lookup_table_exists()
```

Let's revert and revisit later on

cc @bgrgicak @wojtekn

tests/WP_SQLite_Translator_Tests.php

@@ -453,7 +453,9 @@ public function testShowTablesLike() {
 		);
 		$this->assertEquals(
 			array(
-				'_tmp_table',
+				(object) array(
+					'Tables_in_db' => '_tmp_table',
+				),
 			),
 			$this->engine->get_query_results()
 		);

wp-includes/sqlite/class-wp-sqlite-translator.php

@@ -3462,10 +3462,7 @@ private function execute_show() {
 				);
 
 				$this->set_results_from_fetched_data(
-					array_column(
-						$stmt->fetchAll( $this->pdo_fetch_mode ),
-						'Tables_in_db'
-					)
+					$stmt->fetchAll( $this->pdo_fetch_mode )
 				);
 				return;
 
@@ -3476,10 +3473,7 @@ private function execute_show() {
 							"SELECT name FROM sqlite_master WHERE type='table'"
 						);
 						$this->set_results_from_fetched_data(
-							array_column(
-								$stmt->fetchAll( $this->pdo_fetch_mode ),
-								'Tables_in_db'
-							)
+							$stmt->fetchAll( $this->pdo_fetch_mode )
 						);
 						return;