Mark new slow running tests

[matt-graham]

Quite a few slower running tests are now running when --skip-slow option is passed to pytest which was added in #442:

Tests taking more than 10s to run when running with --skip-slow

804.16s call     tests/test_epilepsy.py::test_epilepsy_treatment[83563095832589325021]
254.75s call     tests/test_contraception.py::test_contraception_coverage_with_use_healthsystem[83563095832589325021]
209.24s call     tests/test_epi.py::test_facility_level_distribution[83563095832589325021]
185.45s call     tests/test_tb.py::test_basic_run[83563095832589325021]
152.46s call     tests/test_contraception.py::test_correct_number_of_live_births_created[83563095832589325021]
143.95s call     tests/test_healthsystem.py::test_manipulation_of_service_availability[83563095832589325021]
139.07s call     tests/test_hiv.py::test_use_dummy_version[83563095832589325021]
93.72s call     tests/test_demography.py::test_ageing_of_old_people_up_to_max_age[83563095832589325021]
83.37s call     tests/test_healthsystem.py::test_service_availability_can_be_set_using_list_of_treatment_ids_and_asterisk[83563095832589325021]
58.28s call     tests/test_healthsystem.py::test_determinism_of_hsi_that_run_and_consumables_availabilities[83563095832589325021]
50.55s call     tests/test_contraception.py::test_record_of_appt_footprint_for_switching_to_methods[83563095832589325021]
45.25s call     tests/test_contraception.py::test_initial_distribution_of_contraception[83563095832589325021]
37.82s call     tests/test_maternal_health_helper_and_analysis_functions.py::test_analysis_events_force_availability_of_consumables_when_scheduled_in_anc[83563095832589325021]
35.74s call     tests/test_control_order_of_events.py::test_control_of_ordering_in_full_model[83563095832589325021]
31.98s call     tests/test_maternal_health_helper_and_analysis_functions.py::test_analysis_analysis_events_run_as_expected_and_update_parameters[83563095832589325021]
31.19s call     tests/test_maternal_health_helper_and_analysis_functions.py::test_analysis_events_force_availability_of_consumables_for_sba_analysis[83563095832589325021]
30.90s call     tests/test_maternal_health_helper_and_analysis_functions.py::test_analysis_events_force_availability_of_consumables_for_newborn_hsi[83563095832589325021]
29.25s call     tests/test_maternal_health_helper_and_analysis_functions.py::test_analysis_events_force_availability_of_consumables_for_pnc_analysis[83563095832589325021]
27.70s call     tests/test_prostate_cancer.py::test_check_progression_through_stages_is_blocked_by_treatment[83563095832589325021]
26.41s call     tests/test_maternal_health_helper_and_analysis_functions.py::test_analysis_events_circumnavigates_sf_and_competency_parameters[83563095832589325021]
25.18s call     tests/test_copd.py::test_death_rate
24.25s call     tests/test_tb.py::test_record_of_appt_of_tb_start_treatment_hsi[83563095832589325021]
23.36s call     tests/test_healthsystem.py::test_all_treatment_ids_defined_in_priority_policies[83563095832589325021]
21.32s call     tests/test_healthburden.py::test_get_mappers_in_fullmodel
19.86s call     tests/test_other_adult_cancers.py::test_check_progression_through_stages_is_blocked_by_treatment[83563095832589325021]
19.69s call     tests/test_analysis.py::test_get_treatment_ids
19.17s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Contraception]
17.30s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-CareOfWomenDuringPregnancy]
16.52s call     tests/test_pregnancy_supervisor.py::test_abortion_complications[83563095832589325021]
16.46s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Hiv]
15.90s call     tests/test_healthcareseeking.py::test_care_seeking_from_symptoms_with_different_levels_of_prob_emergency[83563095832589325021]
15.31s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Depression]
15.15s call     tests/test_stunting.py::test_math_of_incidence_calcs[83563095832589325021]
15.11s call     tests/test_pregnancy_supervisor.py::test_induction_of_labour_logic[83563095832589325021]
15.04s call     tests/test_demography.py::test_max_age_initial[83563095832589325021]
14.72s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Malaria]
14.28s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Stunting]
14.27s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-PregnancySupervisor]
14.20s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-CardioMetabolicDisorders]
14.05s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Diarrhoea]
14.04s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Labour]
13.41s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-NewbornOutcomes]
13.39s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Alri]
13.37s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Deviance]
13.07s call     tests/test_module_dependencies.py::test_module_dependencies_all_required[83563095832589325021-PregnancySupervisor, CareOfWomenDuringPregnancy]
13.05s call     tests/test_healthcareseeking.py::test_non_emergency_first_appt_can_be_levels_0_1a_1b_2[83563095832589325021]
12.94s call     tests/test_analysis.py::test_colormap_cause_of_death_label[83563095832589325021]
12.69s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-PostnatalSupervisor]
12.66s call     tests/test_pregnancy_supervisor.py::test_pregnancy_supervisor_chorio_and_prom[83563095832589325021]
12.35s call     tests/test_analysis.py::test_scenario_switcher[83563095832589325021]
12.34s call     tests/test_pregnancy_supervisor.py::test_pregnancy_supervisor_placental_conditions_and_antepartum_haemorrhage[83563095832589325021]
12.26s call     tests/test_module_dependencies.py::test_module_dependencies_allow_initialisation[83563095832589325021-Tb]
11.81s call     tests/test_module_dependencies.py::test_module_dependencies_all_required[83563095832589325021-PregnancySupervisor, Labour]
10.66s call     tests/test_pregnancy_supervisor.py::test_pregnancy_supervisor_pre_eclampsia_and_progression[83563095832589325021]
10.54s call     tests/test_demography.py::test_run_dtypes_and_mothers_female[83563095832589325021]
10.44s call     tests/test_enhanced_lifestyle.py::test_properties_and_dtypes[83563095832589325021]
10.05s call     tests/test_antenatal_interventions.py::test_perfect_run_of_anc_contacts_no_constraints[83563095832589325021]

We should add slow marks to these tests.

We could also potentially somewhat automate this process by adding a scheduled job which runs tests not marked with slow weekly, collects durations and reports any which are over 10s in duration.