Undo recent changes related to Python upgrade

This changeset undoes the recent changes we tried after the Python 3.13 update as they had no bearing on the SSL cert validation errors.  Back to the drawing board!

Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>

app/aws/s3.py

@@ -5,6 +5,7 @@ import time
 from io import StringIO
 
 import botocore
+import gevent
 from boto3 import Session
 from flask import current_app
 
@@ -249,7 +250,7 @@ def get_s3_files():
         for object_key in object_keys:
             read_s3_file(bucket_name, object_key, s3res)
             count = count + 1
-            time.sleep(0.2)
+            gevent.sleep(0.2)
     except Exception:
         current_app.logger.exception(
             f"Trouble reading {object_key} which is # {count} during cache regeneration"
@@ -410,7 +411,7 @@ def get_job_from_s3(service_id, job_id):
                 )
                 retries += 1
                 sleep_time = backoff_factor * (2**retries)  # Exponential backoff
-                time.sleep(sleep_time)
+                gevent.sleep(sleep_time)
                 continue
             else:
                 # Typically this is "NoSuchKey"