fix(walltime): disable PYTHON_PERF_JIT_SUPPORT on macOS

Enabling perf JIT support on macOS produces many unresolved
addresses in stack traces. Force it off until we understand why.

Author: not-matthias

src/executor/helpers/env.rs

@@ -24,7 +24,8 @@ pub fn get_base_injected_env(
         ("PYTHONHASHSEED".into(), "0".into()),
         (
             "PYTHON_PERF_JIT_SUPPORT".into(),
-            if mode == RunnerMode::Walltime {
+            // IMPORTANT: We must not enable this, otherwise we'll have many unresolved addresses on the stack on MacOS
+            if mode == RunnerMode::Walltime && !cfg!(target_os = "macos") {
                 "1".into()
             } else {
                 "0".into()