Proposal: Run more tests in e2e-extended

Description

As a TRE Product Owner
I want to run a wide set of tests regularly
So that I have confidence that critical user workflows are being regularly tested and are not degrading over time

With work done in https://github.com/microsoft/AzureTRE/issues/2838, it should now be possible to run more tests in parallel, without making the total running time prohibitively long.
At the same time, if tests are kept in a separate suite, the wouldn't be required to pass on each PR build

Proposal

Add a new group of tests for the following:

• test_shared_services.py::test_patch_firewall
• test_shared_services.py::test_create_shared_service[tre-shared-service-gitea]
• test_workspace_services.py::test_create_guacamole_service_into_base_workspace
• test_workspace_services.py::test_create_guacamole_service_into_aad_workspace
• test_airlock.py::test_airlock_flow
• test_performance.py::test_bulk_updates_to_ensure_each_resource_updated_in_series
• test_performance.py::test_parallel_resource_creations

(The last one might be debatable as because tests now run in parallel, parallel resource creation is being tested implicitly anyway).

Start by locating how the e2e-extended test group is configured, then inspect the listed tests in test_shared_services.py, test_workspace_services.py, test_airlock.py, and test_performance.py. Add the proposed tests to that separate group and verify that they run in parallel without being required on each PR build.