feat(partition_ota): Modified pytest for storage data

- Modified test for storage data, reduced the size to 500 bytes,
less than IMAGE_HEADER_SIZE (1024), to check the workflow, if the
custom partition other than APP and BOOTLOADER less IMAGE_HEADER_SIZE
performed OTA

components/esp_https_ota/src/esp_https_ota.c

@@ -684,6 +684,11 @@ esp_err_t esp_https_ota_perform(esp_https_ota_handle_t https_ota_handle)
             esp_ota_set_final_partition(handle->update_handle, handle->partition.final, handle->partition.finalize_with_copy);
             handle->state = ESP_HTTPS_OTA_IN_PROGRESS;
 
+            /**
+             * If the final partition is not an app or bootloader, return ESP_ERR_HTTPS_OTA_IN_PROGRESS
+             * As there is no need to read header and verify chip id and chip revision for custom partition.
+             * Directly jump to the OTA in progress state.
+             */
             if (handle->partition.final->type != ESP_PARTITION_TYPE_APP
                 && handle->partition.final->type != ESP_PARTITION_TYPE_BOOTLOADER) {
                 return ESP_ERR_HTTPS_OTA_IN_PROGRESS;