fix gradients of shear, GCLTurbulence and partial overlapping NOJDeficit

py_wake/site/shear.py

py_wake/site/xrsite.py

py_wake/tests/check_speed.py

py_wake/tests/test_deficit_models/test_fuga.py

py_wake/tests/test_utils/test_model_gradients.py

py_wake/tests/test_wind_farm_models/test_memory_usage.py

py_wake/turbulence_models/gcl_turb.py

py_wake/utils/area_overlapping_factor.py

py_wake/utils/profiling.py

py_wake/utils/xarray_utils.py