Assign Main Website to Default Stock during installation

Now logic in our observer (`\Magento\InventorySales\Observer\Website\AssignWebsiteToDefaultStock`) doesn't work because default website created directly via SQL query
So need to expand our data install add assign Main Website to Default Stock (sales channel link)

https://github.com/magento-engcom/msi/blob/develop/app/code/Magento/Store/Setup/InstallSchema.php#L258