Update vpython3 requests

Updates the requests version in .vpython3 to the latest available in
order to pick up a security fix. Also changes the requested version to
the Python 3-only one since Python 2 support was removed from requests.

As a result, also adds several modules that requests now depends on.

Bug: 1448265
Change-Id: If2386751d225dc8cfaecc3387b24d7ece2c415b6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4572128
Reviewed-by: Joanna Wang <jojwang@chromium.org>
Commit-Queue: Joanna Wang <jojwang@chromium.org>
Auto-Submit: Brian Sheedy <bsheedy@chromium.org>

.vpython3

@@ -32,8 +32,20 @@ wheel: <
 # Used by:
 #    presubmit_support.py
 wheel: <
-  name: "infra/python/wheels/requests-py2_py3"
-  version: "version:2.13.0"
+  name: "infra/python/wheels/requests-py3"
+  version: "version:2.31.0"
+>
+wheel: <
+  name: "infra/python/wheels/charset_normalizer-py3"
+  version: "version:2.0.4"
+>
+wheel: <
+  name: "infra/python/wheels/urllib3-py2_py3"
+  version: "version:1.26.6"
+>
+wheel: <
+  name: "infra/python/wheels/idna-py2_py3"
+  version: "version:2.8"
 >
 
 # Used by: