#17784 [CatalogImportExport][export] - added website store views to export

[Yupik]

Description

I've added preloading of website store views, which are used to fill exported CSV file in column "store_view_code", which was empty.

Fixed Issues (if relevant)

1. magento/magento2#17784: store_view_code column has empty values in csv

Manual testing scenarios

1. Create few websites, stores, and store views
2. Create few products, assign them to websites
3. Export data to CSV

[magento-cicd2]

All committers have signed the CLA.

[magento-engcom-team]

Hi @Yupik. Thank you for your contribution
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[sidolov]

Hi @Yupik , please, take a look at failed tests, looks like provided changes broke a lot of integration tests related to import/export

[Yupik]

Hello @sidolov , i've seen it already, i'll take care about this after holidays.

[vpodorozh]

@magento-engcom-team give me test instance

[magento-engcom-team]

Hi @vpodorozh. Thank you for your request. I'm working on Magento instance for you