Add a new script to upload perf tests.

Also add a script to do the bridge between a python 2 and a python 3 interpreter.
This should be removed when the merge scripts will be using python 3 (https://crbug.com/webrtc/13835).

Note that webrtc_dashboard_upload.py will be removed when the new script is stabilized.

Bug: webrtc:13806
Change-Id: I806fa11f417ef37674bdaeb5126c71570e3697d7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/255560
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Christoffer Jansson <jansson@google.com>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Christoffer Jansson <jansson@webrtc.org>
Commit-Queue: Jeremy Leconte <jleconte@google.com>
Cr-Commit-Position: refs/heads/main@{#36252}
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 5c7db2e..f01338f 100755
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -820,9 +820,10 @@
     return input_api.os_path.join(input_api.PresubmitLocalPath(), *args)
 
   excluded_files = [
-      # This test should be run manually after webrtc_dashboard_upload target
+      # These tests should be run manually after webrtc_dashboard_upload target
       # has been built.
-      'catapult_uploader_test.py'
+      'catapult_uploader_test.py',
+      'process_perf_results_test.py',
   ]
 
   test_directories = [