SandboxProd SSO access to EKS

[rfairburn]

Checklist for submitter

If some of the following don't apply, delete the relevant line.

• [ ] Changes file added for user-visible changes (in changes/ and/or orbit/changes/).
• [ ] Documented any API changes (docs/Using-Fleet/REST-API.md or docs/Contributing/API-for-contributors.md)
• [ ] Documented any permissions changes
• [ ] Ensured that input data is properly validated, SQL injection is prevented (using placeholders for values in statements)
• [ ] Added support on fleet's osquery simulator cmd/osquery-perf for new osquery data ingestion features.
• [ ] Added/updated tests
• [ ] Manual QA for all new/changed functionality