Update CI workflow to improve execution time

[philipc2]

Overview

• Removed macos-14 workflow, which is no longer needed as macos-latest now defaults to ARM architecture
• Removed CodeCov from this workflow, which was taking a significant amount of time and should not run each time.

[philipc2]

@rajeeja

I've added a CI workflow to time our tests and see which ones are contributing to the significant slowdowns. I'll share some reports once they finish running, and we can delegate fixes to each as well.

[philipc2]

For the slowest run (windows), looks like:

• Unit Tests: ~12 minutes
• Coverage Tests: ~28 minutes

We run our coverage tests with Numba disabled, which is probably one of the issues.

Slowest Unit Tests

Time (s)	Test
85.74	test/test_cross_sections.py::test_constant_lat_cross_section_grid
59.83	test/test_geometry.py::test_populate_bounds_GCAList_mix_latlon_bounds_mix
59.60	test/test_spatial_hashing.py::test_construction
54.85	test/test_cross_sections.py::test_north_pole
51.58	test/test_spatial_hashing.py::test_is_inside
51.11	test/test_cross_sections.py::TestArcs::test_latitude_along_arc
50.94	test/test_geometry.py::test_populate_bounds_GCA_mix_latlon_bounds_mix
42.75	test/test_remap.py::test_b_return_types_and_counts
26.27	test/test_remap.py::test_b_edge_centers_dim_change
22.72	test/test_point_in_face.py::test_face_centers[healpix]
21.34	test/test_weighted_mean.py::test_csne30_equal_area_dask[1]
19.06	test/test_plot.py::test_to_raster
12.32	test/test_point_in_face.py::test_face_centers[quadhex]
11.81	test/test_point_in_face.py::test_coordinates[quadhex]
10.58	test/test_integrate.py::test_get_zonal_faces_weight_at_constLat_on_pole_one_face
9.81	test/test_integrate.py::test_get_zonal_faces_weight_at_constLat_regular
9.70	test/test_api.py::test_open_grid
9.57	test/test_weighted_mean.py::test_csne30_equal_area_dask[2]
7.74	test/test_geopandas.py::test_read_shpfile
7.27	test/test_geometry.py::test_populate_bounds_normal_latlon_bounds_gca
6.98	test/test_geometry.py::test_populate_bounds_normal_latlon_bounds_gca_list
6.89	test/test_dataarray.py::test_get_dual
6.80	test/test_geometry.py::test_populate_bounds_normal_latlon_bounds_latlonface
4.36	test/test_weighted_mean.py::test_csne30_equal_area_dask[4]
3.66	test/test_integrate.py::test_compare_zonal_weights
3.42	test/test_geometry.py::test_pole_point_inside_polygon_from_vertice_north
2.96	test/test_integrate.py::test_get_faces_constLat_intersection_info_one_intersection
2.91	test/test_helpers.py::test_face_area_coords
2.71	test/test_dataarray.py::test_to_geodataframe
2.44	test/test_grid.py::test_connectivity_node_face_connectivity_from_files

Slowest Coverage Tests

Time (s)	Test
613.80	test/test_plot.py::test_to_raster
324.69	test/test_spatial_hashing.py::test_construction
94.93	test/test_subset.py::test_grid_bounding_box_subset
54.58	test/test_integrate.py::test_compare_zonal_weights
49.98	test/test_zonal.py::TestZonalCSne30::test_zonal_mean_dask
47.94	test/test_zonal.py::TestZonalCSne30::test_lat_inputs
47.81	test/test_zonal.py::TestZonalCSne30::test_non_conservative_zonal_mean
34.69	test/test_weighted_mean.py::test_csne30_equal_area_dask[1]
27.24	test/test_geometry.py::test_face_bounds_latlon_bounds_files
25.30	test/test_remap.py::test_b_return_types_and_counts
24.85	test/test_zonal.py::TestZonalCSne30::test_zonal_weights
21.68	test/test_cross_sections.py::test_south_pole
21.64	test/test_cross_sections.py::test_north_pole
21.53	test/test_zonal.py::TestZonalCSne30::test_non_conservative_zonal_mean_equator
21.45	test/test_zonal.py::TestZonalCSne30::test_non_conservative_zonal_mean_at_pole
18.78	test/test_weighted_mean.py::test_csne30_equal_area_dask[2]
18.04	test/test_from_points.py::test_spherical_voronoi
17.81	test/test_spatial_hashing.py::test_list_of_coords_fesom
13.58	test/test_structured.py::test_read_structured_uxds_from_ds[ersstv5]
13.50	test/test_structured.py::test_read_structured_grid_from_ds[ersstv5]
13.41	test/test_structured.py::test_read_structured_grid_from_latlon[ersstv5]
12.74	test/test_plot.py::test_scatter
12.67	test/test_plot.py::test_line
11.38	test/test_weighted_mean.py::test_csne30_equal_area_dask[4]
10.64	test/test_subset.py::test_inverse_indices
10.55	test/test_grid.py::test_latlon_bounds_populate_bounds_MPAS
9.55	test/test_from_points.py::test_spherical_delaunay
5.60	test/test_dask.py::test_grid_chunking
4.86	test/test_grid.py::test_connectivity_node_face_connectivity_from_files
4.62	test/test_dataset.py::test_integrate
4.58	test/test_weighted_mean.py::test_csne30_equal_area
4.54	test/test_integrate.py::test_single_dim
4.50	test/test_integrate.py::test_multi_dim
4.47	test/test_grid.py::test_face_areas_calculate_total_face_area_file
3.21	test/test_api.py::test_open_grid

[philipc2]

I think we should try and keep most of our unit tests to under a few seconds.

[rajeeja]

This is a good PR. Was worried about the same last week