Enable browser_ui/1_manage/login/log_in_with_2fa_spec.rb and browser_ui/1_manage/group/group_audit_logs_2_spec.rb on Staging.

browser_ui/1_manage/login/log_in_with_2fa_spec.rb is being introduced in this MR but it is currently skipped in staging with :skip_live_env flag. This is due to the following reasons:

• This test enables 2FA on a group. This could cause other tests to fail as has happened before. Before enabling this test on staging, I would like to ensure it is stable in regular qa pipelines and that I am able to run the test against staging from local. This would require that all the selectors introduce as part of this MR reach staging.
• This test creates a new user that will be presented with Guided Tour in staging. We need to disable user_onboarding feature on staging. I currently do not have chatops access. Requested here: https://gitlab.com/gitlab-com/team-member-epics/access-requests/-/issues/5932
• If gitlab-org/gitlab!35442 (merged) reaches staging sooner, the above step would not be requried.

This issue is to enable the test in staging by removing the :skip_live_env flag.

• Add end-to-end test for login with 2FA has reached staging
• Tests are stable in master
• user_onboarding feature has been disabled on staging OR gitlab-org/gitlab!35442 (merged) has reached staging.
• Tests run fine from local against staging
• GITLAB_QA_2FA_OWNER_USERNAME_1 and GITLAB_QA_2FA_OWNER_PASSWORD_1 added to staging pipeline.