Let cuTensorNet hard fail again [only special] (#2978)

Author: kshyatt

.buildkite/pipeline.yml

@@ -104,18 +104,10 @@ steps:
                 package: "cuStateVec"
                 cuda: "12.0"
               soft_fail: true
-            - with:
-                package: "cuTensorNet"
-                cuda: "12.0"
-              soft_fail: true
             - with:
                 package: "cuStateVec"
                 cuda: "13.0"
               soft_fail: true
-            - with:
-                package: "cuTensorNet"
-                cuda: "13.0"
-              soft_fail: true
         plugins:
           - JuliaCI/julia#v1:
               version: "1.10"