Extra facets added for EMAC to map o3, tro3 and aps (#2501)

Co-authored-by: Manuel Schlund <manuel.schlund@dlr.de>

Author: FranziskaWinterstein

esmvalcore/cmor/_fixes/emac/_base_fixes.py

@@ -38,11 +38,8 @@ def get_cube(self, cubes, var_name=None):
         raise ValueError(
             f"No variable of {var_names} necessary for the extraction/"
             f"derivation the CMOR variable '{self.vardef.short_name}' is "
-            f"available in the input file. Hint: in case you tried to extract "
-            f"a 3D variable defined on pressure levels, it might be necessary "
-            f"to define the EMAC variable name in the recipe (e.g., "
-            f"'raw_name: tm1_p39_cav') if the default number of pressure "
-            f"levels is not available in the input file."
+            f"available in the input file. Please specify a valid `raw_name` "
+            f"in the recipe or extra facets file."
         )