Adds the rocky-container-generic element

This makes the rocky-container build more like the generic cloud
image, see:

https://git.rockylinux.org/rocky/kickstarts/-/blob/r8/Rocky-8-GenericCloud.ks

Author: jovial

elements/rocky-container-generic/element-deps

@@ -0,0 +1,3 @@
+rocky-container
+package-installs
+cloud-init-datasources

elements/rocky-container-generic/package-installs.yaml

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+# List taken from https://git.rockylinux.org/rocky/kickstarts/-/blob/r8/Rocky-8-GenericCloud.ks
+
+chrony:
+dnf:
+yum:
+cloud-init:
+cloud-utils-growpart:
+NetworkManager:
+dracut-config-generic:
+dracut-norescue:
+firewalld:
+gdisk:
+grub2:
+kernel:
+nfs-utils:
+rsync:
+tar:
+dnf-utils:
+yum-utils:
+python3-jsonschema:
+qemu-guest-agent:
+dhcp-client:
+rocky-release:
+rng-tools:
+
+aic94xx-firmware:
+  uninstall: true
+alsa-firmware:
+  uninstall: true
+alsa-lib:
+  uninstall: true
+alsa-tools-firmware:
+  uninstall: true
+ivtv-firmware:
+  uninstall: true
+iwl100-firmware:
+  uninstall: true
+iwl1000-firmware:
+  uninstall: true
+iwl105-firmware:
+  uninstall: true
+iwl135-firmware:
+  uninstall: true
+iwl2000-firmware:
+  uninstall: true
+iwl2030-firmware:
+  uninstall: true
+iwl3160-firmware:
+  uninstall: true
+iwl3945-firmware:
+  uninstall: true
+iwl4965-firmware:
+  uninstall: true
+iwl5000-firmware:
+  uninstall: true
+iwl5150-firmware:
+  uninstall: true
+iwl6000-firmware:
+  uninstall: true
+iwl6000g2a-firmware:
+  uninstall: true
+iwl6000g2b-firmware:
+  uninstall: true
+iwl6050-firmware:
+  uninstall: true
+iwl7260-firmware:
+  uninstall: true
+libertas-sd8686-firmware:
+  uninstall: true
+libertas-sd8787-firmware:
+  uninstall: true
+libertas-usb8388-firmware:
+  uninstall: true
+biosdevname:
+  uninstall: true
+iprutils:
+  uninstall: true
+plymouth:
+  uninstall: true

elements/rocky-container-generic/post-install.d/50-cloud-init

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+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+echo -e 'rocky\tALL=(ALL)\tNOPASSWD: ALL' >> /etc/sudoers
+sed -i 's/name: cloud-user/name: rocky/g' /etc/cloud/cloud.cfg

elements/rocky-container-generic/pre-install.d/00-02-reinstall-core

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+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+# RUN this after DIB_DISTRIBUTION_MIRROR has been set up. It installs a
+# load of missing packages from the container image
+dnf install -y @core --allowerasing