refactor: remove dependency on spi_flash include for sector size

components/nvs_flash/test_nvs_host/test_partition_linux.cpp

@@ -0,0 +1,12 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include "esp_private/partition_linux.h"
+#include "esp_partition.h"
+
+uint32_t esp_partition_get_main_flash_sector_size(void)
+{
+    return ESP_PARTITION_EMULATED_SECTOR_SIZE;
+}