Update archive job memory request value for R&Ds (#1183)

- Revert memory request back to 2048M on R&Ds.
- Keep 50GB setting for WCOSS2.

Refs #1144

parm/config/config.resources

@@ -605,7 +605,10 @@ elif [[ ${step} = "arch" || ${step} = "earc" || ${step} = "getic" ]]; then
     eval "export npe_${step}=1"
     eval "export npe_node_${step}=1"
     eval "export nth_${step}=1"
-    eval "export memory_${step}=50GB"
+    eval "export memory_${step}=2048M"
+    if [[ "${machine}" = "WCOSS2" ]]; then
+      eval "export memory_${step}=50GB"
+    fi
 
 elif [ ${step} = "coupled_ic" ]; then