BOM-897: add newrelic metrics and trace details

[robrap]

Add newrelic metrics and trace details to determine performance issue
in CourseListView.

BOM-897

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[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the staging environment in preparation for a release to production.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.