Add E2E test coverage for group compliance report

Add E2E test coverage for group compliance report

The compliance report lists violations on merge requests. Here is a list of all the potential violation types that we need to cover https://docs.gitlab.com/ee/user/compliance/compliance_report/#violation-types

FYI when developing these E2E tests there is a separation of duties to consider https://docs.gitlab.com/ee/user/compliance/compliance_report/#separation-of-duties

Context: gitlab-org/gitlab#389840 (closed)

Test scenarios/ flows

Below table lists down possible scenarios (WIP)

Category	Test	Comment
Separation of Duties	Author merges MR - check violation shows up in report	E2E spec
Separation of Duties	Committer merges MR - check violation shows up in report	E2E spec
Separation of Duties	MR merged with less than two approvals - check violation shows up in report	E2E spec
Separation of Duties	MR merged with two approvals - check violation DOES NOT show up in report	E2E spec
MR Drawer	Merge request drawer shows correct MR details	Front end spec
Code Coverage	Code coverage violations show up in compliance report	Feature not available yet
Pipeline results	MR merged with failed pipeline	Feature not available yet
Pipeline results	MR merged with passed pipeline with warnings	Feature not available yet

Potential bugs

1. Separation of duties => "Author approved merge request" and "Committers approved merge request" not available - Status => Confirmed working as intended