update remaining print_r in HPOS code

plugins/woocommerce/src/Database/Migrations/CustomOrderTable/CLIRunner.php

@@ -494,8 +494,7 @@ class CLIRunner {
 				)
 			);
 		} else {
-			// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r -- This is a CLI command and debugging code is intended.
-			$errors = print_r( $failed_ids, true );
+			$errors = wp_json_encode( $failed_ids, JSON_PRETTY_PRINT );
 
 			return WP_CLI::error(
 				sprintf(

plugins/woocommerce/src/Internal/BatchProcessing/BatchProcessingController.php

@@ -368,13 +368,12 @@ class BatchProcessingController {
 		$batch_detail_string = '';
 		// Log only first and last, as the entire batch may be too big.
 		if ( count( $batch ) > 0 ) {
-			// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r -- Logging is for debugging.
-			$batch_detail_string = '\n' . print_r(
+			$batch_detail_string = "\n" . wp_json_encode(
 				array(
 					'batch_start' => $batch[0],
 					'batch_end'   => end( $batch ),
 				),
-				true
+				JSON_PRETTY_PRINT
 			);
 		}
 		$error_message = "Error processing batch for {$batch_processor->get_name()}: {$error->getMessage()}" . $batch_detail_string;

plugins/woocommerce/src/Internal/DataStores/Orders/OrdersTableDataStore.php

@@ -1308,8 +1308,7 @@ WHERE
 	 * @return void
 	 */
 	private function log_diff( array $diff ): void {
-		// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r -- This is a log function.
-		$this->error_logger->notice( 'Diff found: ' . print_r( $diff, true ) );
+		$this->error_logger->notice( 'Diff found: ' . wp_json_encode( $diff, JSON_PRETTY_PRINT ) );
 	}
 
 	/**