[ch57433] Test set_code_env from public API (#111)

[57433](https://app.clubhouse.io/dataiku/story/57433/from-tse-set-code-env-broken)

Author: thtrunck

dataikuapi/dss/recipe.py

@@ -1121,7 +1121,7 @@ def set_code_env(self, code_env=None, inherit=False, use_builtin=False):
             raise ValueError("This recipe kind does not seem to take a code env selection")
 
         if code_env is not None:
-            rp["envSelection"] = {"envMode": "EXPLICIT_ENV", "envName": "code_env"}
+            rp["envSelection"] = {"envMode": "EXPLICIT_ENV", "envName": code_env}
         elif inherit:
             rp["envSelection"] = {"envMode": "INHERIT"}
         elif use_builtin: