At the moment, we have several IQE tests that use a prometheus instance to push mock metrics and validate that these metrics are correctly ingested by the swatch-metrics.

One of these tests is test_verify_metering_operation_for_events_received_from_prometheus_for_openshift_products.

The idea of this task is to document how to run this test locally against a local swatch metrics service and a local prometheus service.
Additionally, adds a script to push metrics into this local prometheus service.

Acceptance Criteria

• Add a new prometheus folder under "config/prometheus" including a docker-compose file to start up the prometheus service that we'll use for local testing.
• The image to use should be the one from SWATCH-3640.
• Document how to run the test "test_verify_metering_operation_for_events_received_from_prometheus_for_openshift_products" locally
• Document how to run a simple scenario by pushing data into the local prometheus service and checking the events are being processed.