Fix JUT_ASSERT and several other macros (#2711)

* Fix JUT_ASSERT to be a nested define

* Switch names that appear in asserts to be constants instead of defines

* Replace `0` in asserts with `NULL` or `FALSE`

* Fix fpclassify

* Fix ARRAY_SIZE

* Use G_CM3D_F_INF

* More fixes for fpclassify

* Remove FLOAT_LABEL

* Remove incorrect FLAG_ON macro

* Remove UNK_BSS macro

* Silence clangd unused header warning for PCH

src/d/actor/d_a_obj_balloon.cpp

@@ -3,7 +3,7 @@
  * Plumm Minigame Balloon
  */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_obj_balloon.h"
 #include "JSystem/JAudio2/JASAudioThread.h"
@@ -248,7 +248,7 @@ int daObj_Balloon_c::CreateHeap() {
     } else if (mType == SIZE_SMALL_e) {
         modelData = (J3DModelData*)dComIfG_getObjectRes("Obj_bal", 5);
     }
-    JUT_ASSERT(501, modelData != 0);
+    JUT_ASSERT(501, modelData != NULL);
     mModel = mDoExt_J3DModel__create(modelData, 0, 0x11000084);
     return mModel != NULL ? TRUE : FALSE;
 }