This issue is automatically created based on existing pull request: #39772: [Graphql] applied_to must exist on an orderItem

Description (*)

Due to

Because this is missing errors will be thrown once the applied_to is missing. There are 2 ways to fix this. Remove the not null requirement on applied_to or adding the applied_to on the order item as well.
I believe adding it to the order item could result in more consistent frontend as we keep the data between cart item and order item te same.

Manual testing scenarios (*)

Create/fetch an order using Graphql that has orderitems with discounts, make sure to get the discounts and applied_to (as defined by the graphql schema).
You will see the following error

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)

  README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update

  All automated tests passed successfully (all builds are green)
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