MegatronRun: fix .load test

[podkidyshev]

Summary

Make is_run_successfull of MegatronRun compatible with .load test

Test Plan

• Automated CI
• Manual run on CW

Additional Notes

• Redmine ticket

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ipod/megarun/is-run-success

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