Fix amazon linux bootstrap (#11139)

c58497cde (Refactor bootstrap-os (#10983), 2024-03-27) refactored the
boostrap-os include but didn't adapt the amazon linux tasks to the
actual ID of amazon linux ('amzn')

Re-enable the CI so we can avoid that kind of breakage.

.gitlab-ci/packet.yml

@@ -174,6 +174,11 @@ packet_almalinux8-docker:
   extends: .packet_pr
   when: on_success
 
+packet_amazon-linux-2-all-in-one:
+  stage: deploy-part2
+  extends: .packet_pr
+  when: on_success
+
 packet_fedora38-docker-weave:
   stage: deploy-part2
   extends: .packet_pr
@@ -240,11 +245,6 @@ packet_fedora37-calico-swap-selinux:
   extends: .packet_pr
   when: manual
 
-packet_amazon-linux-2-all-in-one:
-  stage: deploy-part2
-  extends: .packet_pr
-  when: manual
-
 packet_almalinux8-calico-nodelocaldns-secondary:
   stage: deploy-part2
   extends: .packet_pr