Merge branch 'mahf708/eamxx/polaris-eamxx-sa' into next (PR E3SM-Project#7600)

Correctly set polaris machine for eamxx standalone testing
    
[BFB]

Author: bartgol

components/eamxx/scripts/machines_specs.py

@@ -171,7 +171,7 @@ class Polaris(CrayMachine):
     concrete = True
     @classmethod
     def setup(cls):
-        super().setup_base("polaris")
+        super().setup_cray("polaris")
 
         compiler = "gnugpu"