Document how to run integration tests in the Web IDE and Workspaces

MR: Pending

Description

After delivering Create a CI job that automates the creation of ... (#43), we have to update the FORK_PROCESS documentation to explain how to perform exploratory testing when upgrading the VSCode Fork.

Acceptance Criteria

• Explain how to create integration Merge Requests.
• Describe the acceptance criteria that needs to be fulfilled in exploratory testing.