ci(login): build login-cuda-efa alongside slurmd-cuda-efa

The EFA matrix row only built the stock `login` target (FABRIC=ib by
default), so login:*-cuda13.2-ubuntu24.04-efa was never pushed.
EFA-fabric clusters need a CUDA + EFA-userland login image to mirror
their slurmd build.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: bobcao3

.github/workflows/build-slurmd-cuda.yaml

@@ -23,7 +23,7 @@ jobs:
       matrix:
         include:
           - fabric: efa
-            target: "slurmd-cuda-efa login"
+            target: "slurmd-cuda-efa login login-cuda-efa"
           - fabric: ib
             target: "slurmd-cuda-ib login-cuda-ib"
     steps: