Speed up testing suite

[cthoyt]

There are several tests that are very slow that make the entire Bioregistry testing suite take more than ten minutes.

138.26s call     tests/test_data_slow.py::TestDataSlow::test_prefix_map_priorities
134.00s call     tests/test_contexts.py::TestContexts::test_obo_context
68.07s call     tests/test_contexts.py::TestContexts::test_obo_converter
66.37s call     tests/test_contexts.py::TestContexts::test_data
65.33s call     tests/test_data.py::TestRegistry::test_obo_prefix_map
44.05s call     tests/test_manager.py::TestResourceManager::test_prefix_map_preferred
33.75s call     tests/test_data.py::TestRegistry::test_records
32.31s call     tests/test_web/test_api.py::TestWeb::test_api_registry
24.02s call     tests/test_data.py::TestRegistry::test_default_prefix_map_no_miriam
23.75s call     tests/test_manager.py::TestResourceManager::test_prefix_map
23.67s call     tests/test_manager.py::TestResourceManager::test_get_records
23.24s call     tests/test_data_slow.py::TestDataSlow::test_unique_iris
22.94s call     tests/test_data_slow.py::TestDataSlow::test_parse_http_vs_https
7.29s call     tests/test_identifiers_org.py::TestIdentifiersOrg::test_url_banana
4.33s call     tests/test_manager.py::TestResourceManager::test_full_rdf
2.85s call     tests/test_manager.py::TestResourceManager::test_rasterized_manager
1.90s call     tests/test_web/test_ui.py::TestUI::test_ui
1.38s call     tests/test_data.py::TestRegistry::test_curie_patterns
1.24s call     tests/test_data.py::TestRegistry::test_lint
0.78s call     tests/test_identifiers_org.py::TestIdentifiersOrg::test_url

One way to address this is to identify if only data files have changed in the diff, then only run data tests.