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_octhashi.cpp

@@ -3,7 +3,7 @@
  * 
 */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_obj_octhashi.h"
 #include "d/d_cc_d.h"
@@ -304,7 +304,7 @@ static int daObjOCTHASHI_Execute(daObjOCTHASHI_c* i_this) {
 /* 80CA5AE0-80CA5B98 000FA0 00B8+00 1/0 0/0 0/0 .text            CreateHeap__15daObjOCTHASHI_cFv */
 int daObjOCTHASHI_c::CreateHeap() {
     J3DModelData* modelData = (J3DModelData*)dComIfG_getObjectRes(l_arcName[0], "S_octhashi00.bmd");
-    JUT_ASSERT(84, modelData != 0);
+    JUT_ASSERT(84, modelData != NULL);
 
     int idx = 0;
     while (idx < mPieceNum) {