Add CI for Tor Browser

.gitlab-ci.yml

.gitlab/ci/containers/base/Containerfile

.gitlab/ci/docker/base/Dockerfile

.gitlab/ci/jobs/startup-test/startup-test-android.py

.gitlab/ci/jobs/startup-test/startup-test.py

.gitlab/ci/jobs/startup-test/startup-test.yml

.gitlab/ci/jobs/update-containers.yml

.gitlab/ci/jobs/update-translations.yml

testing/mozbase/mozinstall/mozinstall/mozinstall.py

testing/mozbase/setup_development.py

testing/mozharness/scripts/does_it_crash.py