[CCP] Automatically commit for clean cherry picks

There's no additional work to do when a cherry-pick is clean. Automatically
commit the cherry-pick when that happens.

Author: kerneltoast

ciq-cherry-pick.py

@@ -63,3 +63,6 @@
 
     with open(MERGE_MSG, "w") as file:
         file.writelines(new_msg)
+
+    if git_res.returncode == 0:
+        subprocess.run(['git', 'commit', '-F', MERGE_MSG])