Certain environments, e.g. Azure Pipelines, override default user
inside container with a custom one, whereas fail to pass proper
seccomp profile for the docker image.
As a result, chromium sandboxing fails.
To ease life of devops deploying tests in various CI's, this patch
disables Chromium sandbox by default.
References #4084
- We do not need the public BrowserType different from BrowserTypeBase anymore.
- Removing 'logName' parameter from runAbortableTask - it will
be used for metadata instead.