[TEST] Use tempfile for temporary file handling in tests

Replaced hardcoded file paths with `tempfile.NamedTemporaryFile` to ensure safe and temporary file handling during serialization tests. This improves test reliability and avoids residual files on disk.

Author: Leguark

test/test_modules/test_serialize_model.py

@@ -1,3 +1,5 @@
+import tempfile
+
 import json
 import os
 import pprint
@@ -49,23 +51,28 @@ def _validate_serialization(original_model, model_deserialized):
 
 def test_save_model_to_disk():
     model = gp.generate_example_model(ExampleModel.COMBINATION, compute_model=False)
-    save_model(model, "temp/test_save_model_to_disk.gempy")
+    with tempfile.NamedTemporaryFile(mode='w+', delete=True) as tmp:
+        tmp_name = tmp.name + ".gempy"  # Store the name to use it later
+        save_model(model, tmp_name)
 
-    # Load the model from disk
-    loaded_model = load_model("temp/test_save_model_to_disk.gempy")
+        # Load the model from disk
+        loaded_model = load_model(tmp_name)
     _validate_serialization(model, loaded_model)
 
     gp.compute_model(loaded_model)
     if True:
         import gempy_viewer as gpv
         gpv.plot_3d(loaded_model, image=True)
 
+
     # Test save after compute
-    save_model(
-        model=model,
-        path="temp/test_save_model_to_disk.gempy",
-        validate_serialization=True
-    )
+    with tempfile.NamedTemporaryFile(mode='w+', delete=True) as tmp:
+        tmp_name = tmp.name + ".gempy"  # Store the name to use it later
+        save_model(
+            model=model,
+            path=tmp_name,
+            validate_serialization=True
+        )
 
 
 def test_interpolation_options():