Restore use of dmidecode in dracut for assettag and uuid

This prevents exposing these values in /proc/cmdline.

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

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

@@ -6,7 +6,9 @@
 if [ "${root}" = "wwinit" ]
 then
     info "root=${root}"
-    wwinit_uri="$(getarg wwinit.uri)"
+    uuid=$(dmidecode -s system-uuid)
+    assetkey=$(dmidecode -s chassis-asset-tag | sed -E -e 's/(^ +| +$)//g' -e 's/^(Unknown|Not Specified)$//g' -e 's/ /_/g')
+    wwinit_uri="$(getarg wwinit.uri)?assetkey=${assetkey}&uuid=${uuid}"
     export wwinit_container="${wwinit_uri}&stage=container&compress=gz"; info "wwinit_container=${wwinit_container}"
     export wwinit_system="${wwinit_uri}&stage=system&compress=gz"; info "wwinit_system=${wwinit_system}"
     export wwinit_runtime="${wwinit_uri}&stage=runtime&compress=gz"; info "wwinit_runtime=${wwinit_runtime}"