Prevent ignition from running twice in a provision-to-disk configuration

Ignition runs during provision-to-disk, and then also tries to run again during
sytsemd. This commit adds a sentinel file during the initial provision-to-disk
that is detected by systemd to prevent re-running ignition partitioning /
formatting.

- Fixes: #1981

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

dracut/modules.d/90wwinit/load-wwinit.sh

@@ -46,3 +46,11 @@ info "warewulf: mounting ${wwinit_root_device} at ${NEWROOT}"
 for stage in "image" "system" "runtime"; do
     get_stage "${stage}"
 done
+
+# Copy /warewulf/run from initramfs to NEWROOT
+# This preserves state files created by wwinit.d scripts (e.g., ignition marker)
+if [ -d /tmp/wwinit/warewulf/run ]; then
+    info "warewulf: preserving /warewulf/run to mounted root"
+    mkdir -p "${NEWROOT}/warewulf"
+    cp -a /tmp/wwinit/warewulf/run "${NEWROOT}/warewulf/"
+fi