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/JSystem/JKernel/JKRHeap.cpp

@@ -492,7 +492,7 @@ void operator delete[](void* ptr) {
 /* 802CED84-802CED88 2C96C4 0004+00 1/0 1/0 0/0 .text
  * state_register__7JKRHeapCFPQ27JKRHeap6TStateUl               */
 void JKRHeap::state_register(JKRHeap::TState* p, u32 id) const {
-    JUT_ASSERT(1213, p != 0);
+    JUT_ASSERT(1213, p != NULL);
     JUT_ASSERT(1214, p->getHeap() == this);
 }