fedora: live-installer image type

This image type produces the same artifact as the current workstation
installer live media.

During the implementation of this new installer some names have been
changed to make a bit more sense in the source tree. Installer images
now always mention which installer they are (anaconda, etc).

tools/test-case-generators/format-request-map.json

@@ -698,6 +698,18 @@
     "no-image-info": true,
     "overrides": {}
   },
+  "live-installer": {
+    "compose-request": {
+      "distro": "",
+      "arch": "",
+      "image-type": "live-installer",
+      "repositories": [],
+      "filename": "installer.iso",
+      "blueprint": {}
+    },
+    "no-image-info": true,
+    "overrides": {}
+  },
   "image-installer-with-users": {
     "compose-request": {
       "distro": "",