chore(tests): add GLTFLoader integration test

[rkeshwani]

This PR is made in attempt to remove the following blocker. #3085 There is an existing PR #3086 and this is to solve the blocker on that pr.

This commit adds an integration test for useLoader with GLTFLoader.

The test verifies that the loader can correctly parse a binary GLB file. To achieve this in a Node.js test environment, the following changes were made:

• node-fetch is added as a dev dependency to provide fetch, Request, and Response objects.
• These are polyfilled globally in the Jest setup file for all tests to use.
• The test mocks the fetch call to return a minimal, valid GLB file as an ArrayBuffer.

This approach was chosen after discovering that the native test environment does not support the features required for a full native integration test.

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[CodyJasonBennett]

Thanks for this. It helps. My time has been sparse lately, but I am looking into this issue.