Minor corrections

.gitlab-ci.yml

@@ -167,6 +167,7 @@ spack:install:
       --show-log-on-error
 
     - ${STACK_LOCATION}/spack/bin/spack -e ${environment}
+      buildcache create
       --update-index
       --key EDC904DCE3D2E84E
       /buildcache

stacks/pinot-noir/packages_stack.yaml

 packages:
   all:
-    providers:
-      mpi: [openmpi, intel-oneapi-mpi]
-      jpeg: [libjpeg]
-      zlib-api: [zlib-ng]
     require:
       - spec: ^intel-oneapi-mpi
         when: '%oneapi ^mpi'