Add cray-mpich and dependencies to packages

config-hlrs/packages.yaml

@@ -1,4 +1,23 @@
 packages:
+  all:
+    providers:
+      mpi: [cray-mpich]
+  cray-mpich:
+    externals:
+    - spec: cray-mpich@8.1.30%gcc
+      prefix: /opt/cray/pe/mpich/8.1.30/ofi/gnu/12.3
+      modules:
+      - libfabric/1.15.2.0
+    - spec: cray-mpich@8.1.30%cce
+      prefix: /opt/cray/pe/mpich/8.1.30/ofi/cray/17.0
+      modules:
+      - libfabric/1.15.2.0
+    buildable: false
+  libfabric:
+    externals:
+    - spec: libfabric@1.15.2 fabrics=cxi,tcp,udp
+      prefix: /opt/cray/libfabric/1.15.2.0
+    buildable: false
   python:
     externals:
     - spec: python@3.6.15+bz2+crypt+ctypes+dbm+lzma+nis+pyexpat~pythoncmd+readline+sqlite3+ssl~tkinter+uuid+zlib