[Backport] Fix typo in SQL join when joining custom option prices for price indexer [2.2]

[udovicic]

Description (*)

In case where product has price variation for custom option per website, only default value (store_id = 0) is taken into an account due to typo in SQL statement.

NOTE: This is a copy of #19546, but for a 2.2-develop.

Fixed Issues (if relevant)

1. N/A

Manual testing scenarios (*)

This one is pretty obvious from diff, but...

1. Create scenario where simple product price is regulated per website and have at least two websites
2. Set default price to amount X
3. Set price of custom option (on default view) to amount to Y
4. Switch scope to another website and set price of custom option to be 0
5. Execute price indexer
6. Difference between min and max price should be visible only on one website, however all websites will have this difference

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @udovicic. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me 2.2-develop instance - deploy vanilla Magento instance

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[sivaschenko]

@udovicic thanks for your contribution, this pull request will be processed after #19546 is merged

[magento-engcom-team]

Hi @orlangur, thank you for the review.
ENGCOM-3622 has been created to process this Pull Request

[sivaschenko]

Hi @udovicic can you please include static tests fix commit c1be7d8 from the 2.3 PR in this backport

[udovicic]

@sivaschenko Changes have been pushed

[sivaschenko]

@udovicic thank you

[VasylShvorak]

✔️ QA passed

[ghost]

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