awscli, botocore and boto3 work together and typically require matching
versions.
* gnu/packages/python-xyz.scm (python-botocore): Update to 1.22.11.
(python-boto3): Update to 1.19.11.
[native-inputs]: Add python-pytest.
* gnu/packages/python-web.scm (awscli): Update to 1.21.11.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>