Quarantine flaky test in group_search_results_spec.rb

Ravi Kumarrequested to merge
duo-edit-20251212-091651 into master

What does this MR do?

Quarantines a flaky test that has been failing intermittently in CI.

Test: Gitlab::Elastic::GroupSearchResults for merge_requests when include_archived is true returns archived and unarchived results

File: ee/spec/lib/gitlab/elastic/group_search_results_spec.rb

Flaky test issue: https://gitlab.com/gitlab-org/quality/test-failure-issues/-/issues/19278

Recent failure: https://gitlab.com/gitlab-org/gitlab/-/jobs/12412688338

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