ci: isolate DS18B20 protocol test

.github/workflows/ds18b20-heltec-v3.yml

@@ -37,4 +37,4 @@ jobs:
           submodules: recursive
       - uses: ./.github/actions/setup-native
       - name: Run DS18B20 unit tests
-        run: platformio test -e native -f test_ds18b20
+        run: platformio test -e native-ds18b20 -f test_ds18b20

test/test_ds18b20/test_main.cpp

@@ -1,4 +1,3 @@
-#include "TestUtil.h"
 #include "modules/Telemetry/Sensor/DS18B20Protocol.h"
 #include <cstdlib>
 #include <unity.h>

variants/native/ds18b20/platformio.ini

@@ -0,0 +1,5 @@
+[env:native-ds18b20]
+extends = native_base
+test_build_src = false
+lib_deps =
+lib_ldf_mode = off