Adds a test user-data file

It's contents are somewhat irrelevant, as cloud-init shouldn't pick it (it should not even run).
It's good to be one creating the default user, because if it does
happen, the test easily breaks.

e2e/launchertester/testdata/TestSetupWithCloudInit/do_not_block_on_wsl1

@@ -0,0 +1,20 @@
+#cloud-config
+users:
+  - name: nontestuser
+    groups: sudo
+    shell: /bin/bash
+    sudo: ALL=(ALL) NOPASSWD:ALL
+  - name: testuser
+    groups: sudo
+    shell: /bin/bash
+    sudo: ALL=(ALL) NOPASSWD:ALL
+
+write_files:
+  - path: /etc/wsl.conf
+    append: true
+    content: |
+      [user]
+      default=testuser
+
+runcmd:
+  - touch /home/testuser/with_default_user.done