Try to fix codegen test in release CI

Author: fantix

tests/test_codegen.py

@@ -22,6 +22,7 @@
 import shutil
 import subprocess
 import os
+import sys
 import tempfile
 
 from edgedb import _testbase as tb
@@ -66,17 +67,24 @@ async def run(*args, extra_env=None):
                 raise
 
         await run(
-            "edgedb-py", extra_env={"EDGEDB_PYTHON_CODEGEN_PY_VER": "3.7.5"}
+            sys.executable,
+            "-m",
+            "edgedb.codegen",
+            extra_env={"EDGEDB_PYTHON_CODEGEN_PY_VER": "3.7.5"},
         )
         await run(
-            "edgedb-py",
+            sys.executable,
+            "-m",
+            "edgedb.codegen",
             "--target",
             "blocking",
             "--no-skip-pydantic-validation",
             extra_env={"EDGEDB_PYTHON_CODEGEN_PY_VER": "3.9.2"},
         )
         await run(
-            "edgedb-py",
+            sys.executable,
+            "-m",
+            "edgedb.codegen",
             "--target",
             "async",
             "--file",