Quarantine value_streams_spec
What does this MR do and why?
Quarantine ee/spec/requests/api/graphql/analytics/cycle_analytics/value_streams_spec.rb#464 and ee/spec/requests/api/graphql/analytics/cycle_analytics/value_streams_spec.rb#530 from recent master broken incidents:
- gitlab-org/quality/engineering-productivity/master-broken-incidents#8255 (closed)
- gitlab-org/quality/engineering-productivity/master-broken-incidents#8256 (closed)
- gitlab-org/quality/engineering-productivity/master-broken-incidents#8258 (closed)
Related to #482804 (closed) and #482805 (closed)
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