tests: unset new config for forward compat test

test_runner/regress/test_compatibility.py

@@ -226,6 +226,11 @@ def test_forward_compatibility(
     )
 
     try:
+        # Previous version neon_local and pageserver are not aware
+        # of the new config.
+        # TODO: remove this once the code reaches main
+        neon_env_builder.pageserver_get_impl = None
+
         neon_env_builder.num_safekeepers = 3
         neon_local_binpath = neon_env_builder.neon_binpath
         env = neon_env_builder.from_repo_dir(