Draft: Try coverband gem with Gitlab rails for mapping

What does this MR do and why?

Trying out a POC to see if coverband gem could be used to map E2E test coverage.

Start a redis-server locally on localhost:6379 as it is one of the default paths for redis as described here.

How to test locally?

Pre-requisites: docker is installed, gdk is up and running

Run an example E2E spec

WEBDRIVER_HEADLESS=false GITLAB_ADMIN_PASSWORD="XXX" GITLAB_QA_ADMIN_ACCESS_TOKEN=XXX GITLAB_PASSWORD="XXX" QA_LOG_LEVEL=DEBUG QA_GITLAB_URL=http://172.16.123.1:3000 bundle exec rspec  ./qa/specs/features/ee/browser_ui/10_govern/security_reports_spec.rb:233

MR acceptance checklist

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Screenshots or screen recordings

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Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.