[ci] run image staging jobs after image job completes

Signed-off-by: Christopher Desiniotis <[email protected]>

Author: cdesiniotis

.common-ci.yml

@@ -172,3 +172,5 @@ release:staging-gpu-operator:
     - .target-gpu-operator
   variables:
     OUT_IMAGE_NAME: "${NGC_STAGING_REGISTRY}/gpu-operator"
+  needs:
+    - image:gpu-operator