Speed up image uploads

As long as the image isn't used later on, there is no point in the
automatic `get` after `put`.

Also limit the inputs that each `put` step uses.

Closes: #29

pipelines/jobs/rust-xwin.yml.j2

@@ -43,9 +43,11 @@
       - in_parallel:
           steps:
             - put: image-rust-xwin
-              params:
+              inputs: detect
-                image: image-rust-xwin/image.tar
+              params: { image: image-rust-xwin/image.tar }
+              no_get: true
             - put: image-rust-xwin-ci
-              params:
+              inputs: detect
-                image: image-rust-xwin-ci/image.tar
+              params: { image: image-rust-xwin-ci/image.tar }
+              no_get: true
 {% endmacro %}

pipelines/jobs/simple-image.yml.j2

@@ -17,5 +17,7 @@
         {%- endfor %}
         {%- endif %}
       - put: image-{{ job.name }}
+        inputs: detect
         params: { image: image/image.tar }
+        no_get: true
 {%- endmacro -%}