set PYTHON_BINARY

Author: blink1073

.evergreen/config.yml

@@ -206,7 +206,7 @@ functions:
       params:
         binary: bash
         working_dir: "src"
-        include_expansions_in_env: [VERSION, TOPOLOGY, AUTH, SSL, ORCHESTRATION_FILE,
+        include_expansions_in_env: [VERSION, TOPOLOGY, AUTH, SSL, ORCHESTRATION_FILE, PYTHON_BINARY,
           STORAGE_ENGINE, REQUIRE_API_VERSION, DRIVERS_TOOLS, TEST_CRYPT_SHARED, AUTH_AWS, LOAD_BALANCER]
         args: [.evergreen/just.sh, run-server, "${TEST_NAME}"]
     - command: expansions.update