Fix OTel Agent EKS test

[liustanley]

What does this PR do?

Fixes OTel Agent EKS test which was flaky due to dockerhub pull rate limits. This PR updates the image URL, removes the flake marker, and shortens the calendar start timeout to 30 minutes.

Motivation

Describe how to test/QA your changes

Possible Drawbacks / Trade-offs

Additional Notes

OTEL-2141

[agent-platform-auto-pr]

[Fast Unit Tests Report]

On pipeline 46857304 (CI Visibility). The following jobs did not run any unit tests:

Jobs:

• tests_deb-arm64-py3
• tests_deb-x64-py3
• tests_flavor_dogstatsd_deb-x64
• tests_flavor_heroku_deb-x64
• tests_flavor_iot_deb-x64
• tests_rpm-arm64-py3
• tests_rpm-x64-py3
• tests_windows-x64

If you modified Go files and expected unit tests to run in these jobs, please double check the job logs. If you think tests should have been executed reach out to #agent-devx-help

[agent-platform-auto-pr]

Test changes on VM

Use this command from test-infra-definitions to manually test this PR changes on a VM:

inv create-vm --pipeline-id=46857304 --os-family=ubuntu

Note: This applies to commit 9b55d70

[cit-pr-commenter]

Regression Detector

[liustanley]

/merge

[dd-devflow]

🚂 MergeQueue: pull request added to the queue

The median merge time in main is 24m.

Use /merge -c to cancel this operation!