ADD: compilers spec to sles15/x86_64/stable

env/sles15/x86_64/admin/stable/spack.yaml

@@ -7,11 +7,13 @@ spack:
       root: $spack/opt/spack/stable
   definitions:
   - compilers:
+    - gcc@7.5.0
     - gcc@=12.3.0
     - intel-oneapi-compilers@=2024.1.0
     - intel-oneapi-compilers@=2022.1.0
-    - gcc@=13.2.0 arch=linux-sles15-x86_64
+    - gcc@=13.2.0
     - nvhpc@23.9
+    - cce@17.0.0
   - gcc_7.5.0:
     - fpart@1.6.0/di4akxx
   - gcc_12.3_mpich:
@@ -28,8 +30,8 @@ spack:
   modules:
     default:
       roots:
-        tcl: $spack/opt/spack/stable/modulefiles
-      tcl:
+        lmod: $spack/opt/spack/stable/modulefiles
+      lmod:
         cray-mpich:
           environment:
             set: