chore(cmake): CMake cleanup and simplifications (#2620)

* CMake cleanup and simplifications

* Position Independent Code is need for radiolib_native

* Some more cleanup & repair

* Fix SIMU_SRC scope issue

* fix: avoid warnings due to assembler statements from StdPeriph on arm64 native

radio/src/model_init.cpp

@@ -130,9 +130,7 @@ void applyDefaultTemplate()
 
 #if defined(COLORLCD)
 
-#if !defined(GTESTS)
   loadDefaultLayout();
-#endif
 
   // enable switch warnings
   for (int i = 0; i < NUM_SWITCHES; i++) {