Autotests: Refactor mol-files-export-import-query-features.spec.ts

[AlexeyGirin]

Tests in mol-files-export-import-query-features.spec.ts contains lots of duplicate code like:

    await selectTopPanelButton(TopPanelButton.Save, page);
    await clickOnFileFormatDropdown(page);
    await page.getByTestId('SDF V2000-option').click();

    const sdfFileV2000Expected = page
      .getByTestId('sdf-preview-area-text')
      .inputValue();
    //  Save it to test-data if no file in where
    await saveToFile(
      'SDF/Query-Feature/Chirality-expected.sdf',
      await sdfFileV2000Expected,
    );
    await pressButton(page, 'Cancel');

Consider usage of verifyFileExport function (extend its functionality if needed)