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_balloon_2D.cpp

@@ -3,7 +3,7 @@
  * 
 */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_balloon_2D.h"
 #include "JSystem/J2DGraph/J2DGrafContext.h"
@@ -163,7 +163,7 @@ int daBalloon2D_c::createHeap() {
         return  0;
     }
     dRes_info_c* resInfo = dComIfG_getObjectResInfo(l_arcName);
-    JUT_ASSERT(445, resInfo != 0);
+    JUT_ASSERT(445, resInfo != NULL);
     JKRArchive* arc = resInfo->getArchive();
     mScreen->setPriority("zelda_balloon_game.blo", 0x20000, arc);
     dPaneClass_showNullPane(mScreen);
@@ -243,7 +243,7 @@ int daBalloon2D_c::create() {
         if (!fopAcM_entrySolidHeap(this, daBalloon2D_createHeap, 0)) {
             return cPhs_ERROR_e;
         }
-        JUT_ASSERT(566, daBalloon2D_c::myclass == 0);
+        JUT_ASSERT(566, daBalloon2D_c::myclass == NULL);
         myclass = this;
         setHIO(true);
     }