Update license compliance extension to use collapsed endpoint

What does this MR do and why?

Describe in detail what your merge request does and why.

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How to set up and validate locally

• In a rails console enable flag Feature.enable(:refactor_license_compliance_extension)
• Reach out to me for a demo, or attempt steps below
• Clone the https://gitlab.com/gitlab-examples/security/security-reports project locally
• Manually trigger the pipeline to run for Master. This can be done by going to the CI/CD -> Pipelines tab on the left nav and then clicking the Run Pipeline button.
• Create a new MR. I suggest changing something simple like a letter or two in the README.md file. We just need a pipeline to complete and run. The sample project uses test reports to generate the data so doesn't matter what you change just need a MR.
• Set up Allowed/Denied licenses in https://<localhost>/<group>/<project>/-/licenses#policies
• Create a new MR
• See License compliance widget

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #356337 (closed)