ci: run HIL tests in parallel.

tests/nrf/src/bin/buffered_uart.rs

@@ -1,6 +1,8 @@
 #![no_std]
 #![no_main]
 #![feature(type_alias_impl_trait)]
+#[path = "../common.rs"]
+mod common;
 
 use defmt::{assert_eq, *};
 use embassy_executor::Spawner;

tests/nrf/src/bin/buffered_uart_spam.rs

@@ -1,6 +1,8 @@
 #![no_std]
 #![no_main]
 #![feature(type_alias_impl_trait)]
+#[path = "../common.rs"]
+mod common;
 
 use core::mem;
 use core::ptr::NonNull;

tests/nrf/src/bin/timer.rs

@@ -1,6 +1,8 @@
 #![no_std]
 #![no_main]
 #![feature(type_alias_impl_trait)]
+#[path = "../common.rs"]
+mod common;
 
 use defmt::{assert, info};
 use embassy_executor::Spawner;