Improve performance, add additional ram, improve Ubuntu user-data (and fix 22.04)

debian/debian-11-amd64.json

@@ -36,6 +36,7 @@
       "type": "qemu",
       "vm_name": "{{ user `template` }}",
       "qemuargs": [
+        [ "-cpu", "host" ],
         [ "-m", "{{ user `memory` }}" ],
         [ "-display", "{{ user `qemu_display` }}" ]
       ]
@@ -81,7 +82,7 @@
     "https_proxy": "{{env `https_proxy`}}",
     "iso_checksum": "eb3f96fd607e4b67e80f4fc15670feb7d9db5be50f4ca8d0bf07008cb025766b",
     "iso_name": "debian-11.7.0-amd64-netinst.iso",
-    "memory": "1024",
+    "memory": "4096",
     "mirror": "http://cdimage.debian.org/cdimage/release",
     "mirror_directory": "11.7.0/amd64/iso-cd",
     "name": "debian-11",