Closes: #14332

Description

With this PR we refine the barcode scan behavior by prioritising the global unique identifier over the SKU. On top of that, we trigger both requests in parallel to speed the process.

Steps to reproduce

1. Assign the same identifier to a product SKU and a different product GTIN
2. Go to orders
3. Tap on the barcode scanner
4. Scan that identifier
5. See how the GTIN product is added

Testing information

I also verified that the product is properly added when the identifier is assigned to the SKU

Screenshots

N/A

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on all devices (phone/tablet) and no regressions are added.