Revert "consistent csv yield"

This reverts commit 27952ca.

Author: LuiggiTenorioK

autosubmit_api/routers/v4/experiments.py

@@ -364,26 +364,20 @@ def _generate_csv(expid: str):
 
         csv_file = StringIO()
         writer = csv.writer(csv_file)
+        writer.writerow(
+            [
+                "job_name",
+                "run_id",
+                "section",
+                "status",
+                "submit",
+                "start",
+                "finish",
+                "out",
+                "err",
+            ]
+        )
 
-        # Yield the header first
-        header = [
-            "job_name",
-            "run_id",
-            "section",
-            "status",
-            "submit",
-            "start",
-            "finish",
-            "out",
-            "err",
-        ]
-        writer.writerow(header)
-        csv_file.seek(0)
-        yield csv_file.read()
-        csv_file.seek(0)
-        csv_file.truncate(0)
-
-        # Yield each job row
         for job in job_generator:
             writer.writerow(
                 [