Don't automatically free temporary memory, let the application call SDL_FreeTemporaryMemory() when it's ready.

Also mark up all functions that return temporary memory with SDL_DECLSPEC_TEMP, to help people implementing language bindings.

Fixes https://github.com/libsdl-org/SDL/issues/10378

include/SDL3/SDL_pen.h

@@ -224,9 +224,6 @@ extern SDL_DECLSPEC SDL_bool SDLCALL SDL_PenConnected(SDL_PenID instance_id);
 /**
  * Retrieves a human-readable description for a SDL_PenID.
  *
- * This returns temporary memory which will be automatically freed later, and
- * can be claimed with SDL_ClaimTemporaryMemory().
- *
  * \param instance_id the pen to query.
  * \returns a string that contains the name of the pen, intended for human
  *          consumption. The string might or might not be localised, depending
@@ -238,7 +235,7 @@ extern SDL_DECLSPEC SDL_bool SDLCALL SDL_PenConnected(SDL_PenID instance_id);
  *
  * \since This function is available since SDL 3.0.0.
  */
-extern SDL_DECLSPEC const char * SDLCALL SDL_GetPenName(SDL_PenID instance_id);
+extern SDL_DECLSPEC_TEMP const char * SDLCALL SDL_GetPenName(SDL_PenID instance_id);
 
 /**
  * Pen capabilities, as reported by SDL_GetPenCapabilities()