Update compiler restrictions to language restrictions

Author: CodeGat

spack.yaml

@@ -40,14 +40,18 @@ spack:
       require:
       - '@4.1.7'
     # Compilers
-    intel-oneapi-compilers-classic:
+    c:
       require:
-      - '@2021.10.0'
-
+      - intel-oneapi-compilers-classic@2021.10.0
+    cxx:
+      require:
+      - intel-oneapi-compilers-classic@2021.10.0
+    fortran:
+      require:
+      - intel-oneapi-compilers-classic@2021.10.0
     # Specifications that apply to all packages
     all:
-      require:
-      - '%access_intel'
+      prefer:
       - target=x86_64_v4
   view: true
   concretizer: