pt: add necessary jit.export (#3337)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: CaRoLZhangxy

deepmd/pt/model/model/dipole_model.py

@@ -55,6 +55,7 @@ def forward(
             model_predict["updated_coord"] += coord
         return model_predict
 
+    @torch.jit.export
     def forward_lower(
         self,
         extended_coord,

deepmd/pt/model/model/dp_zbl_model.py

@@ -58,6 +58,7 @@ def forward(
             model_predict["force"] = model_ret["dforce"]
         return model_predict
 
+    @torch.jit.export
     def forward_lower(
         self,
         extended_coord,

deepmd/pt/model/model/ener_model.py

@@ -57,6 +57,7 @@ def forward(
             model_predict["updated_coord"] += coord
         return model_predict
 
+    @torch.jit.export
     def forward_lower(
         self,
         extended_coord,

deepmd/pt/model/model/make_model.py

@@ -202,6 +202,7 @@ def forward_common_lower(
             )
             return model_predict
 
+        @torch.jit.export
         def format_nlist(
             self,
             extended_coord: torch.Tensor,

deepmd/pt/model/model/polar_model.py

@@ -47,6 +47,7 @@ def forward(
             model_predict["updated_coord"] += coord
         return model_predict
 
+    @torch.jit.export
     def forward_lower(
         self,
         extended_coord,