wasm: enable default temp allocator

After #3592 I think it makes sense to also enable the temp allocator by default

base/runtime/default_temporary_allocator.odin

@@ -1,7 +1,7 @@
 package runtime
 
 DEFAULT_TEMP_ALLOCATOR_BACKING_SIZE: int : #config(DEFAULT_TEMP_ALLOCATOR_BACKING_SIZE, 4 * Megabyte)
-NO_DEFAULT_TEMP_ALLOCATOR: bool : ODIN_OS == .Freestanding || ODIN_OS == .JS || ODIN_DEFAULT_TO_NIL_ALLOCATOR
+NO_DEFAULT_TEMP_ALLOCATOR: bool : ODIN_OS == .Freestanding || ODIN_DEFAULT_TO_NIL_ALLOCATOR
 
 when NO_DEFAULT_TEMP_ALLOCATOR {
 	Default_Temp_Allocator :: struct {}