Add elastic-otel-java to weekly benchmarks

[JonasKunz]

What does this PR do?

Adds the Elastic Distribtution of OpenTelemetry Java agent to the weekly bechmarks. It executes it for:

• the latest snapshot
• the latest release
• the latest release with inferred spans enabled

@v1v any suggestions on howto best test this? Simply merge and trigger the pipeline? I've manually verified that the downloading of the snapshot from the workflow run works correctly

[v1v]

@v1v any suggestions on howto best test this? Simply merge and trigger the pipeline? I've manually verified that the downloading of the snapshot from the workflow run works correctly

Create an upstream feature branch called test/update-benchmarks.

Then go to https://github.com/elastic/apm-agent-java/blob/97e47dc8eedc6f211d8938ed06f762cee98a89ce/catalog-info.yaml#L120, click on New Build and fill the form:

[JonasKunz]

I had to use a very shortened name for the inferred-spans agent, because otherwise the results table header would get messed up. Now everything works as expected: https://buildkite.com/elastic/apm-agent-java-opentelemetry-benchmark/builds/57