CI: Free 35GB of unused files on the runner

Free 35GB of unused files, mostly from unused development environments.
This helps with the out of disk space problems we were seeing on
FreeBSD runners.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #18400

ZFS-CI-Type: full

Author: tonyhutter

.github/workflows/scripts/qemu-1-setup.sh

@@ -6,6 +6,27 @@
 
 set -eu
 
+# The default runner has a bunch of development tools and other things
+# that we do not need.  Remove them here to free up a total of 35GB.
+#
+# First remove packages - this frees up ~10GB
+echo "Disk space before purge:"
+df -h /
+sudo docker image prune --all --force
+sudo docker builder prune -a
+unneeded="microsoft-edge-stable|azure-cli|google-cloud|google-chrome-stable|"\
+"temurin|llvm|firefox|mysql-server|snapd|android|dotnet|haskell|ghcup|"\
+"powershell|julia|swift|miniconda|chromium"
+sudo apt-get -y remove $(dpkg-query -f '${binary:Package}\n' -W | grep -E "'$unneeded'")
+sudo apt-get -y autoremove
+
+# Next, remove unneeded files in /usr.  This frees up an additional 25GB.
+sudo rm -fr /usr/local/lib/android /usr/share/dotnet /usr/local/.ghcup \
+        /usr/share/swift /usr/local/share/powershell /usr/local/julia* \
+        /usr/share/miniconda /usr/local/share/chromium
+echo "Disk space after:"
+df -h /
+
 # The default 'azure.archive.ubuntu.com' mirrors can be really slow.
 # Prioritize the official Ubuntu mirrors.
 #