Backport PR #13334: Fix race condition in paths.get_ipython_dirs()

IPython/paths.py

@@ -67,7 +67,7 b' def get_ipython_dir() -> str:'
                     " using a temp directory.".format(parent))
             ipdir = tempfile.mkdtemp()
         else:
-            os.makedirs(ipdir)
+            os.makedirs(ipdir, exist_ok=True)
     assert isinstance(ipdir, str), "all path manipulation should be str(unicode), but are not."
     return ipdir