Update OpenTelemetry Java Agent to 2.4.0

[ThomasVitale]

Summary

Bump opentelemetry-java from 1.32.0 to 2.4.0

Fixes gh-113

Release Notes

OpenTelemetry Java 2.0.0 introduced breaking changes. You can find more details here. Make sure to check them before upgrading to this new version of the OpenTelemetry Buildpack.

Checklist

• [x] I have viewed, signed, and submitted the Contributor License Agreement.
• [x] I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• [x] I have added an integration test, if necessary.
• [x] I have reviewed the styleguide for guidance on my code quality.
• [x] I'm happy with the commit history on this PR (I have rebased/squashed as needed).

[dmikusa]

Looks good to me. I'm going to merge this and cut a release.