Add parser for GoCov coverage

[rekathiru]

This GoCov parser has been implemented in order to parse the unit tests coverage generated by the go underlying coverage tool(GoCov) with the command as below:

go test ./... -race -coverprofile=coverage.txt -covermode=atomic

Output from above command would be:

mode: atomic
github.com/dev/crd/pkg/aws/services.go:72.81,76.16 3 3
github.com/dev/crd/pkg/aws/services.go:76.16,77.41 1 2
github.com/dev/crd/pkg/aws/services.go:77.41,78.23 1 2

Where every line would have the coverage details as below:

domain_name/root_dir/repo/dir_path.../file_name:<start-line>.<start-column>,<end-line>.<end-column> <statement-count>  <execution-count>

So, the execution-count would say how many times the statements-count executed while running the tests. If the execution-count is above 1, then the statements-count has been executed at least once. So, we mark the start-line to end-line as covered. Otherwise, it will go into coverage miss.

Testing done

• Relevant unit tests have been added.
• Actively used by multiple projects in Intuit

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue