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_npc_post.cpp

@@ -3,7 +3,7 @@
  * 
 */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_npc_post.h"
 #include "dol2asm.h"
@@ -797,7 +797,7 @@ COMPILER_STRIP_GATE(0x80AAD2A0, &lit_4070);
 /* 80AAD2A4-80AAD2A8 0000B8 0004+00 0/3 0/0 0/0 .rodata          @4071 */
 #pragma push
 #pragma force_active on
-SECTION_RODATA static f32 const lit_4071 = -1000000000.0f;
+SECTION_RODATA static f32 const lit_4071 = -G_CM3D_F_INF;
 COMPILER_STRIP_GATE(0x80AAD2A4, &lit_4071);
 #pragma pop