Solve problem with \Magento\InventoryCatalog\Plugin\CatalogInventory\Model\ResourceModel\Stock\Status\AdaptAddStockDataToCollectionPlugin

In Magento without MSI, when method \Magento\CatalogInventory\Model\ResourceModel\Stock\Status::addStockDataToCollection is called with $isFilterInStock = false, it is left joining
cataloginventory_stock_status table. Even if some product is absent in this table (e.g. Bundle product without any options), it is present in collection selection.

In Magento with MSI, plugin method \Magento\InventoryCatalog\Plugin\CatalogInventory\Model\ResourceModel\Stock\Status\AdaptAddStockDataToCollectionPlugin::aroundAddStockDataToCollection is inner joining inventory_stock_X tables. So, if some product is absent in this table (e.g. Bundle product without any options), it will be absent in collection selection. But, if we will use left join, collection selection will contain all products, present in database.

This problem must be solved.

Also unskip test variation in \Magento\Bundle\Model\Product\FixedBundleWithSpecialPriceCalculatorTest::testPriceForFixedBundle.

Start with Magento\InventoryCatalog\Plugin\CatalogInventory\Model\ResourceModel\Stock\Status\AdaptAddStockDataToCollectionPlugin::aroundAddStockDataToCollection and compare its join behavior with the described non-MSI method. Verify that using a left join retains products absent from inventory_stock_X tables, then unskip and run Magento\Bundle\Model\Product\FixedBundleWithSpecialPriceCalculatorTest::testPriceForFixedBundle.

Written by the indexing model from the issue text.