Revert "[core/memory] Remove defered heap allocation on Linux." (#2974)

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2974
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: PavelBARABANOV <pavelbarabanov94@gmail.com>
Co-committed-by: PavelBARABANOV <pavelbarabanov94@gmail.com>

src/core/memory.h

@@ -495,6 +495,8 @@ public:
 
     bool InvalidateNCE(Common::ProcessAddress vaddr, size_t size);
 
+    bool InvalidateSeparateHeap(void* fault_address);
+
 private:
     Core::System& system;