removed DISK_IMAGE SHIT

Author: navaneeth-dev

hack/provider/provider.yaml

@@ -69,24 +69,7 @@ options:
     default: "30"
   DISK_IMAGE:
     description: The disk image to use.
-    default: docker-20-04
-    suggestions:
-      - docker-20-04
-      - almalinux-8-x64
-      - almalinux-9-x64
-      - centos-7-x64
-      - centos-stream-9-x64
-      - centos-stream-8-x64
-      - debian-10-x64
-      - debian-12-x64
-      - debian-11-x64
-      - fedora-37-x64
-      - fedora-38-x64
-      - rockylinux-8-x64
-      - rockylinux-9-x64
-      - ubuntu-20-04-x64
-      - ubuntu-22-04-x64
-      - ubuntu-23-04-x64
+    default: docker
   MACHINE_TYPE:
     description: The machine type to use.
     default: vc2-1c-1gb