build: Bump base image from focal to jammy

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:focal
+FROM ubuntu:jammy
 
 WORKDIR /root
 
@@ -7,17 +7,10 @@ COPY ./tools/scripts/lib_install ./tools/scripts/lib_install
 
 RUN ./tools/scripts/lib_install/linux/install-dev.sh
 
-# Set cpp, cc, and c++ to v10
-RUN update-alternatives --set cc /usr/bin/gcc-10
-RUN update-alternatives --set c++ /usr/bin/g++-10
-RUN update-alternatives --set cpp /usr/bin/cpp-10
-
 RUN ./tools/scripts/lib_install/linux/install-lib.sh
 
 # NOTE:
-# 1. `task` doesn't have an apt/yum package so we use its install script.
-# 2. We don't want to install it using `install-prebuilt-packages.sh` since users may use that on
-#    their own machines and it would change their environment in a way that can't easily be undone.
+# `task` doesn't have an apt/yum package so we use its install script.
 RUN sh -c "$(curl --location https://taskfile.dev/install.sh)" -- -d -b /usr/local/bin
 
 # Remove cached files