Update images

- replace shell script with pwsh
- add more tools from actions/virtual-environments
- fixup pwsh modules installation
- install node 12 and 16 in base
- add node 14 in js-*
- build rust images
- restrict flavours to amd64 only for now
- add helper scripts from actions/virtual-environments
- overhaul build and dockerfile

linux/ubuntu/scripts/basic.sh

@@ -0,0 +1,13 @@
+#!/bin/bash -e
+################################################################################
+##  File:  basic.sh
+##  Desc:  Installs basic command line utilities and dev packages
+################################################################################
+# source: https://github.com/actions/virtual-environments/blob/5ae2170ebe90a53e1cdc9c507ed3e0f1471d6b66/images/linux/scripts/helpers/install.sh
+
+apt-get update
+common_packages=$(jq -r ".apt.common_packages[]" "/imagegeneration/toolset.json")
+cmd_packages=$(jq -r ".apt.cmd_packages[]" "/imagegeneration/toolset.json")
+# we depend on re-splitting behaviour here
+# shellcheck disable=SC2068
+apt-get install -y --no-install-recommends ${common_packages[@]} ${cmd_packages[@]}