Saleor 7780 fix for collection tests

[eCzerniak]

I want to merge this change because it fix tests for collection

• adding stable tag in each test to run them will all tests in releases,
• adding collectionChannelListingUpdate mutation,
• adding fields in collectionAddProducts mutation,
• changes in getCollection function (removed called function for default channel and added as argument)

PR intended to be tested with API branch:

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. [ ] Changes are mentioned in the changelog
5. [ ] The changes are tested in different browsers and in light/dark mode

Test environment config

API_URI=https://automation-dashboard.staging.saleor.cloud/graphql/ MARKETPLACE_URL=https://marketplace-gray.vercel.app/

[patrys]

Task linked: SALEOR-7780 [Fix] Collection tests