Replace genisoimage with xorriso

genisoimage has been removed from RHEL-9 and is replaced with
xorriso.

This patch updates the package map to xorriso instead of
replacing the genisoimage key map to avoid the breakage for
other distros.

Closes-Bug: #1953013

Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: I31f6d4f080afd93ae067c37348e9ef570f0a34d4

dib/ironic-python-agent-ramdisk/pkg-map

@@ -15,6 +15,7 @@
   },
   "family": {
     "redhat": {
+      "genisoimage": "xorriso",
       "libffi-dev": "libffi-devel",
       "libssl-dev": "openssl-devel",
       "open-iscsi": "iscsi-initiator-utils",