Update response checks and assertions in upload tests

Replaces usage of 'response.ok' with 'response.is_success' for response validation. Refactors assertions to use single-line format with error messages as arguments for improved readability.

Author: JR-1991

tests/api/test_upload.py

@@ -184,7 +184,7 @@ def test_file_replacement_wo_metadata(self):
                 is_filepid=False,
             )
 
-            if not response.ok:
+            if not response.is_success:
                 raise Exception(response.json()["message"])
 
         # Assert
@@ -223,7 +223,7 @@ def test_file_replacement_w_metadata(self):
             json_str=df.json(),
         )
 
-        if not response.ok:
+        if not response.is_success:
             raise Exception(response.json()["message"])
 
         # Retrieve file ID
@@ -252,7 +252,7 @@ def test_file_replacement_w_metadata(self):
                 is_filepid=False,
             )
 
-            if not response.ok:
+            if not response.is_success:
                 raise Exception(response.json()["message"])
 
         # Assert