refactor(serverless): replace print() with logger in upload fallback paths

Address Copilot review comment from PR #466:

Replace print() statements with logger.warning() for consistency with
the module's logging setup. This allows proper log level control and
maintains consistent logging behavior throughout the module.

Changes:
- upload_image(): Use logger.warning() instead of print()
- upload_file_to_bucket(): Use logger.warning() instead of print()
- upload_in_memory_object(): Use logger.warning() instead of print()

All fallback messages now use structured logging with single-line
format for better log parsing and filtering.

Author: deanq

runpod/serverless/modules/rp_scale.py

@@ -195,7 +195,7 @@ async def get_jobs(self, session: ClientSession):
 
             except TooManyRequests:
                 log.debug(
-                    f"JobScaler.get_jobs | Too many requests. Debounce for 5 seconds."
+                    "JobScaler.get_jobs | Too many requests. Debounce for 5 seconds."
                 )
                 await asyncio.sleep(5)  # debounce for 5 seconds
             except asyncio.CancelledError:

runpod/serverless/utils/rp_upload.py

@@ -133,11 +133,11 @@ def upload_image(
 
     if boto_client is None:
         # Save the output to a file
-        print("No bucket endpoint set, saving to disk folder 'simulated_uploaded'")
-        print("If this is a live endpoint, please reference the following:")
-        print(
+        logger.warning(
+            "No bucket endpoint set, saving to disk folder 'simulated_uploaded'. "
+            "If this is a live endpoint, please reference: "
             "https://github.com/runpod/runpod-python/blob/main/docs/serverless/utils/rp_upload.md"
-        )  # pylint: disable=line-too-long
+        )
 
         os.makedirs("simulated_uploaded", exist_ok=True)
         sim_upload_location = f"simulated_uploaded/{image_name}{file_extension}"
@@ -261,11 +261,11 @@ def upload_file_to_bucket(
     key = f"{prefix}/{file_name}" if prefix else file_name
 
     if boto_client is None:
-        print("No bucket endpoint set, saving to disk folder 'local_upload'")
-        print("If this is a live endpoint, please reference the following:")
-        print(
+        logger.warning(
+            "No bucket endpoint set, saving to disk folder 'local_upload'. "
+            "If this is a live endpoint, please reference: "
             "https://github.com/runpod/runpod-python/blob/main/docs/serverless/utils/rp_upload.md"
-        )  # pylint: disable=line-too-long
+        )
 
         os.makedirs("local_upload", exist_ok=True)
         local_upload_location = f"local_upload/{file_name}"
@@ -316,9 +316,9 @@ def upload_in_memory_object(
     key = f"{prefix}/{file_name}" if prefix else file_name
 
     if boto_client is None:
-        print("No bucket endpoint set, saving to disk folder 'local_upload'")
-        print("If this is a live endpoint, please reference the following:")
-        print(
+        logger.warning(
+            "No bucket endpoint set, saving to disk folder 'local_upload'. "
+            "If this is a live endpoint, please reference: "
             "https://github.com/runpod/runpod-python/blob/main/docs/serverless/utils/rp_upload.md"
         )