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_dan.cpp

@@ -3,7 +3,7 @@
  * Insect - Pillbug
 */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_obj_dan.h"
 #include "SSystem/SComponent/c_math.h"
@@ -602,7 +602,7 @@ cPhs__Step daObjDAN_c::create() {
         pos.y += 100.0f;
         gnd_chk.SetPos(&pos);
         f32 cross = dComIfG_Bgsp().GroundCross(&gnd_chk);
-        if (cross != -1e9f) {
+        if (cross != -G_CM3D_F_INF) {
             current.pos.y = cross;
         }