[RAM] Fix flaky getActionErrorLog API integration tests

[JiaweiWu]

Summary

Resolves: https://github.com/elastic/kibana/issues/137004

Instead of filtering by the connector Id, it's now filtering by the connector name, which is deterministic and makes the test less flaky.

Checklist

• [x] Unit or functional tests were updated or added to match the most common scenarios

[JiaweiWu]

Flaky test build: https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/1009

[kibana-ci]

:green_heart: Build Succeeded

• Buildkite Build
• Commit: d9cad7c8c53abd02090b09c49089790ec9695886

Metrics [docs]

✅ unchanged

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

[elasticmachine]

Pinging @elastic/response-ops (Team:ResponseOps)