Add geneva environment.

env/geneva/spack.yaml

+  specs:
+    - boost@1.72
+    - minuit@5.34.14
+    - gsl@2.6
+    - openssl@1.1.1l
+    - jq@1.6
+    - amdscalapack@3.0
+  concretization: together
+  view: false