Dashboard filtering e2e test

What does this MR do?

This is the implementation of the test case described in E2E test for Metrics Dashboard filtering

This test can increase the test suite run time since it needs to have a fully assembled project to Monitor with Prometheus on GKE and deployment of two environments. The strategy to mitigate such an increase in time is to use only one setup for multiple tests. It is not recommended the use of before(:all) (or after(:all)) but this was favored to keep the duration of the run as low as possible.

Note that the pipeline wait for success timeout is increased by a minute to support the deployment wait time of two environments.