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_twGate.cpp

@@ -3,7 +3,7 @@
  * 
 */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_obj_twGate.h"
 #include "d/d_com_inf_game.h"
@@ -109,7 +109,7 @@ static Vec const l_cheeckPos1[13] = {
 int daTwGate_c::CreateHeap() {
     J3DModelData* modelData =
         (J3DModelData*)dComIfG_getObjectRes(l_resNameIdx[mGateType], l_bmdIdx[mGateType]);
-    JUT_ASSERT(292, modelData != 0);
+    JUT_ASSERT(292, modelData != NULL);
     mModel = mDoExt_J3DModel__create(modelData, 0x80000, 0x11000284);
     if (mModel == NULL) {
         return 0;