FIX issue#26217 - Wrong fields selection while using fragments on GraphQL

[phoenix128]

Wrong fields selection while using fragments on GraphQL products query

Description (*)

The proposed solution is to use \GraphQL\Type\Definition\ResolveInfo::getFieldSelection to retrieve the fields list instead of the previsous implementation.

Fixed Issues (if relevant)

1. Wrong fields selection while using fragments on GraphQL products query #26217: Wrong fields selection while using fragments on GraphQL

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 are green)

[m2-assistant]

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[magento-engcom-team]

Hi @lenaorobei, thank you for the review.
ENGCOM-6535 has been created to process this Pull Request
✳️ @lenaorobei, could you please add one of the following labels to the Pull Request?

Label	Description
Auto-Tests: Covered	All changes in Pull Request is covered by auto-tests
Auto-Tests: Not Covered	Changes in Pull Request requires coverage by auto-tests
Auto-Tests: Not Required	Changes in Pull Request does not require coverage by auto-tests

[lenaorobei]

@magento run Integration Tests

[engcom-Bravo]

✔️ QA Passed

[lenaorobei]

@phoenix128, could you please add api-functional test to this PR with the query provided in the issue?

[m2-assistant]

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