misc: memory: Migrate from OutOfMemoryException to SystemException entirely (#5399)

Fix a regression with address space allocation while providing more
information about the context of the exception.

src/Ryujinx.Cpu/AddressSpace.cs

@@ -199,7 +199,7 @@ namespace Ryujinx.Cpu
 
                     break;
                 }
-                catch (OutOfMemoryException)
+                catch (SystemException)
                 {
                     baseMemory?.Dispose();
                     mirrorMemory?.Dispose();