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_pumpkin.cpp

@@ -3,7 +3,7 @@
  * 
 */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_obj_pumpkin.h"
 #include "d/d_cc_d.h"
@@ -438,7 +438,7 @@ COMPILER_STRIP_GATE(0x80CB83F0, &lit_4865);
 /* 80CB83F4-80CB83F8 000084 0004+00 0/2 0/0 0/0 .rodata          @4866 */
 #pragma push
 #pragma force_active on
-SECTION_RODATA static f32 const lit_4866 = -1000000000.0f;
+SECTION_RODATA static f32 const lit_4866 = -G_CM3D_F_INF;
 COMPILER_STRIP_GATE(0x80CB83F4, &lit_4866);
 #pragma pop