[Ops] Make kibana-release-operators admin for kibana-test-pipeline

[watson]

To avoid having to give permissions to entire teams where only a single member needs admin access, we've created the special GitHub team kibana-release-operators to which we can add these individuals.

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 50b7d67

Failed CI Steps

• x-pack/test_serverless/functional/test_suites/observability/config.ts

Test Failures

• [job] [logs] x-pack/test_serverless/functional/test_suites/observability/config.ts / serverless observability UI Serverless Observability Cases Configure Case "after all" hook in "Configure Case"

Metrics [docs]

✅ unchanged

History

• 💔 Build #176823 failed 1207402

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @watson