[podman] Update to Ubuntu 22.04

This PR updates the container to Ubuntu 22.04.

Signed-off-by: Pascal Nasahl <[email protected]>

util/docker/Dockerfile

@@ -4,7 +4,7 @@
 
 # Docker file for OpenTitan side channel analysis and fault injection setup.
 
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 LABEL version="0.1"
 LABEL description="OpenTitan SCA/FI image"
@@ -16,7 +16,7 @@ ARG TIME_ZONE=America/New_York
 # This is convenient if we want to switch to different python version.
 # Note: numba, a chipwhisperer dependency, requires python 3.7+ but does not
 # support python 3.9 yet.
-ARG PYTHON=python3.8
+ARG PYTHON=python3.10
 ARG VENV_PATH=/opt/venv
 ARG GCC_VERSION=9