Fix sending attibutes on variant create/update in datagrid on product details page

[poulch]

closes #2470

Screenshots

Pull Request Checklist

1. This code contains UI changes
2. All visible strings are translated with proper context including data-formatting
3. Attributes data-test-id are added for new elements
4. The changes are tested in Chrome/Firefox/Safari browsers and in light/dark mode
5. Your code works with the latest stable version of the core
6. I added changesets file (instructions in contribution guide

Test environment config

API_URI=https://automation-dashboard.staging.saleor.cloud/graphql/
APPS_MARKETPLACE_API_URI=https://apps.staging.saleor.io/api/v2/saleor-apps

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To run all tests, just select the stable checkbox. To speed up tests, increase the number of containers. Tests will be re-run only when the "run e2e" label is added.

1. stable
2. app
3. attribute
4. category
5. collection
6. customer
7. giftCard
8. homePage
9. login
10. menuNavigation
11. navigation
12. orders
13. pages
14. payments
15. permissions
16. plugins
17. productType
18. products
19. sales
20. shipping
21. translations
22. variants
23. vouchers

CONTAINERS=2

[changeset-bot]

🦋 Changeset detected

Latest commit: b963be0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
saleor-dashboard	Patch

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