Update activations path in dlwp tests (#1217)

* Update activations path in dlwp tests

* Update example paths

Author: pzharrington

examples/weather/dlwp_healpix/configs/model/modules/activations/capped_gelu.yaml

@@ -14,5 +14,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-_target_: physicsnemo.models.layers.activations.CappedGELU
+_target_: physicsnemo.nn.activations.CappedGELU
 cap_value: 10

examples/weather/dlwp_healpix/configs/model/modules/activations/capped_leaky_relu.yaml

@@ -14,5 +14,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-_target_: physicsnemo.models.layers.activations.CappedLeakyReLU
+_target_: physicsnemo.nn.activations.CappedLeakyReLU
 cap_value: 10

test/models/dlwp_healpix/test_healpix_recunet_model.py

@@ -29,7 +29,7 @@
 @pytest.fixture
 def conv_next_block_dict(in_channels=3, out_channels=1):
     activation_block = {
-        "_target_": "physicsnemo.models.layers.activations.CappedGELU",
+        "_target_": "physicsnemo.nn.activations.CappedGELU",
         "cap_value": 10,
     }
     conv_block = {
@@ -72,7 +72,7 @@ def encoder_dict(conv_next_block_dict, down_sampling_block_dict, recurrent_block
 def up_sampling_block_dict(in_channels=3, out_channels=1):
     """Block dict fixture."""
     activation_block = {
-        "_target_": "physicsnemo.models.layers.activations.CappedGELU",
+        "_target_": "physicsnemo.nn.activations.CappedGELU",
         "cap_value": 10,
     }
     up_sampling_block = {

test/models/dlwp_healpix/test_healpix_unet_model.py

@@ -29,7 +29,7 @@
 @pytest.fixture
 def conv_next_block_dict(in_channels=3, out_channels=1):
     activation_block = {
-        "_target_": "physicsnemo.models.layers.activations.CappedGELU",
+        "_target_": "physicsnemo.nn.activations.CappedGELU",
         "cap_value": 10,
     }
     conv_block = {
@@ -58,7 +58,7 @@ def down_sampling_block_dict():
 def up_sampling_block_dict(in_channels=3, out_channels=1):
     """Upsampling dict fixture."""
     activation_block = {
-        "_target_": "physicsnemo.models.layers.activations.CappedGELU",
+        "_target_": "physicsnemo.nn.activations.CappedGELU",
         "cap_value": 10,
     }
     up_sampling_block = {