[cmd/telemetrygen/internal/e2etest]: Report for failed tests on main

[github-actions]

Auto-generated report for __run_3 job build.

Link to failed build: https://github.com/open-telemetry/opentelemetry-collector-contrib/actions/runs/15414826413

Test Failures

• TestGenerateTraces

Note: Information about any subsequent build failures that happen while
this issue is open, will be added as comments with more information to this issue.

[github-actions]

Pinging code owners for cmd/telemetrygen: @mx-psi @codeboten @Erog38. See Adding Labels via Comments if you do not have permissions to add labels yourself. For example, comment '/label priority:p2 -needs-triaged' to set the priority and remove the needs-triaged label.