Add CI OIDC claims to discovery endpoint

What does this MR do and why?

Add CI OIDC claims to discovery endpoint

Add subset of CI OIDC claims to the discovery endpoint to make trusted publishing to third party package managers easier

References

• Fixes #428061 (closed)
• Original MR from @nejc !170072 (closed)

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Before	After

How to set up and validate locally

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