Add passing test for local task with non Send/Sync arg

Ensure it is possible to pass a non send and non Sync
argument when spawning a local task. This is ok
since it will only be possible to spawn the task
on the same executor and priority level

rtic-macros/ui/spawn-local-no-send-sync.rs

@@ -0,0 +1,29 @@
+#![no_main]
+
+#[rtic_macros::mock_app(device = mock, dispatchers = [EXTI0])]
+mod app {
+    use super::*;
+
+    #[shared]
+    struct Shared {}
+
+    #[local]
+    struct Local {}
+
+    #[init]
+    fn init(_cx: init::Context) -> (Shared, Local) {
+        task1::spawn().ok();
+        (Shared {}, Local {})
+    }
+
+    #[task(priority = 1)]
+    async fn task1(cx: task1::Context) {
+        cx.local_spawner.task2(Default::default()).ok();
+    }
+
+    #[task(priority = 1, is_local_task = true)]
+    async fn task2(_cx: task2::Context, _nsns: super::NotSendNotSync) {}
+}
+
+#[derive(Default)]
+struct NotSendNotSync(PhantomData<*mut u8>);