Remove dependency on dpkg-eatmydata

The custom package does not improve much over the force-unsafe-io
dpkg option, so use that.

roles/float-base/tasks/apt.yml

@@ -78,9 +78,9 @@
 
 # When testing, try to make dpkg faster by disabling fsync.
 - name: Speed up dpkg
-  apt:
-    name: dpkg-eatmydata
-    state: present
+  copy:
+    dest: "/etc/dpkg/dpkg.cfg.d/no-sync"
+    content: "force-unsafe-io\n"
   when: "testing|default(True)"
 
 # Remove legacy stretch/buster mtail package pin.