fix(ci): fix docker_image job failing on workflow_dispatch

The 'Build cuda-quantum-dev image (release)' step in the cudaq_image
job had `push: true` hardcoded, introduced in efcaf5b when ccache
support was added. Every other push directive in docker_images.yml uses
`push: ${{ inputs.environment != '' }}`.

The unconditional push caused the step to attempt a registry push even
during CI-only workflow_dispatch runs where no external registry is
configured, failing the docker_image matrix job and tripping the
ci_summary aggregator with n_fail=1.

Fix: make the push conditional on inputs.environment, consistent with
the other three push directives in the same file (lines 190, 368, 722).

Signed-off-by: Dr Chamyoung 医者 <alokads06@gmail.com>

Author: InboraStudio

.github/workflows/docker_images.yml

@@ -635,7 +635,7 @@ jobs:
           tags: ${{ steps.cudaqdev_metadata.outputs.tags }}
           labels: ${{ steps.cudaqdev_metadata.outputs.labels }}
           platforms: ${{ inputs.platforms }}
-          push: true
+          push: ${{ inputs.environment != '' }}
 
       - name: Extract ccache from release build
         timeout-minutes: 15