[ntsc-1.2] Match __osMalloc.c and code_800FC620.c (new/delete) (#2106)

* Match __osMalloc

* Match src/code/code_800FC620.c (new/delete)

* Wrap versions-specific files in ifdefs to fix compilation

* Fix bss

* Remove {FAULT,RAND,OSMALLOC}_VERSION in favor of PLATFORM_N64

* Fix __osMalloc data splits, add unused strings

* __osMalloc.h -> osMalloc.h

* Fix merge

src/code/debug_malloc.c

@@ -1,4 +1,5 @@
 #include "global.h"
+#include "osMalloc.h"
 
 #define LOG_SEVERITY_NOLOG 0
 #define LOG_SEVERITY_ERROR 2
@@ -125,6 +126,6 @@ void DebugArena_Cleanup(void) {
     __osMallocCleanup(&sDebugArena);
 }
 
-u8 DebugArena_IsInitialized(void) {
+s32 DebugArena_IsInitialized(void) {
     return __osMallocIsInitialized(&sDebugArena);
 }