Fix warning in yarn jest instance_project_selector_spec.js

What does this MR do and why?

fix for #432459 (closed)

The test needs different API resonses for subsequent requests, since the id field is unique.

Screenshots or screen recordings

none

How to set up and validate locally

Run yarn jest ee/spec/frontend/security_orchestration/components/policies/instance_project_selector_spec.js in the terminal

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