chore: Convert simu/simulator/companion to SDL2 (#3085)

* chore(pc): convert simu/simulator/companion to use SDL2

* switch companion builds to SDL2 - OSX is not converted
the linux change is done a bit hacky, it should be done by updating the EdgeTX docker container

* update build system setup scripts

* add compatibility for old and new SDL2 cmake integration

* fix windows installer

* fix simulator audio on windows by using DirectSound vie SDL2

* fix windows audio with SDL2
enable simu for windows builds

* remove workflow changes for linux builds, this needs to be fixed in the build environment

* fix OSX build, thx @pafleraf

* fix windows audio for companion and simulator with SDL2

* select SDL2 branch of the build-docker environment

* Revert "select SDL2 branch of the build-docker environment"

This reverts commit da801609d78e1aed513ad7d9d8ab3ebded2900b9.

* fix tests with SDL2

radio/src/simu.cpp

@@ -19,6 +19,11 @@
  * GNU General Public License for more details.
  */
 
+#if defined(SIMU_AUDIO)
+  #include <SDL.h>
+  #undef main
+#endif
+
 #include "fx.h"
 #include "FXExpression.h"
 #include "FXPNGImage.h"
@@ -29,11 +34,6 @@
 #include <ctype.h>
 #include "targets/simu/simulcd.h"
 
-#if defined(SIMU_AUDIO)
-  #include <SDL.h>
-  #undef main
-#endif
-
 #if LCD_W > 212
   #define LCD_ZOOM 1
 #else
@@ -94,11 +94,14 @@ FXDEFMAP(OpenTxSim) OpenTxSimMap[] = {
 FXIMPLEMENT(OpenTxSim, FXMainWindow, OpenTxSimMap, ARRAYNUMBER(OpenTxSimMap))
 
 OpenTxSim::OpenTxSim(FXApp* a):
-  FXMainWindow(a, "OpenTX Simu", nullptr, nullptr, DECOR_ALL, 20, 90, 0, 0)
+  FXMainWindow(a, "EdgeTX Simu", nullptr, nullptr, DECOR_ALL, 20, 90, 0, 0)
 {
   bmp = new FXPPMImage(getApp(), nullptr, IMAGE_OWNED|IMAGE_KEEP|IMAGE_SHMI|IMAGE_SHMP, W2, H2);
 
 #if defined(SIMU_AUDIO)
+  #if defined(_WIN32) || defined(_WIN64)
+  putenv("SDL_AUDIODRIVER=directsound");
+  #endif
   SDL_Init(SDL_INIT_AUDIO);
 #endif