Add support to IVirtualMemoryManager for zero-copy reads (#6251)

* - WritableRegion: enable wrapping IMemoryOwner<byte>
- IVirtualMemoryManager impls of GetWritableRegion() use pooled memory when region is non-contiguous.
- IVirtualMemoryManager: add GetReadOnlySequence() and impls
- ByteMemoryPool: add new method RentCopy()
- ByteMemoryPool: make class static, remove ctor and singleton field from earlier impl

* - BytesReadOnlySequenceSegment: move from Ryujinx.Common.Memory to Ryujinx.Memory
- BytesReadOnlySequenceSegment: add IsContiguousWith() and Replace() methods
- VirtualMemoryManagerBase:
  - remove generic type parameters, instead use ulong for virtual addresses and nuint for host/physical addresses
  - implement IWritableBlock
  - add virtual GetReadOnlySequence() with coalescing of contiguous segments
  - add virtual GetSpan()
  - add virtual GetWritableRegion()
  - add abstract IsMapped()
  - add virtual MapForeign(ulong, nuint, ulong)
  - add virtual Read<T>()
  - add virtual Read(ulong, Span<byte>)
  - add virtual ReadTracked<T>()
  - add virtual SignalMemoryTracking()
  - add virtual Write()
  - add virtual Write<T>()
  - add virtual WriteUntracked()
  - add virtual WriteWithRedundancyCheck()
- VirtualMemoryManagerRefCountedBase: remove generic type parameters
- AddressSpaceManager: remove redundant methods, add required overrides
- HvMemoryManager: remove redundant methods, add required overrides, add overrides for _invalidAccessHandler handling
- MemoryManager: remove redundant methods, add required overrides, add overrides for _invalidAccessHandler handling
- MemoryManagerHostMapped: remove redundant methods, add required overrides, add overrides for _invalidAccessHandler handling
- NativeMemoryManager: add get properties for Pointer and Length
- throughout: removed invalid <inheritdoc/> comments

* make HvMemoryManager class sealed

* remove unused method

* adjust MemoryManagerHostTracked

* let MemoryManagerHostTracked override WriteImpl()

src/Ryujinx.Memory/WritableRegion.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Buffers;
 
 namespace Ryujinx.Memory
 {
@@ -6,6 +7,7 @@ namespace Ryujinx.Memory
     {
         private readonly IWritableBlock _block;
         private readonly ulong _va;
+        private readonly IMemoryOwner<byte> _memoryOwner;
         private readonly bool _tracked;
 
         private bool NeedsWriteback => _block != null;
@@ -20,6 +22,12 @@ namespace Ryujinx.Memory
             Memory = memory;
         }
 
+        public WritableRegion(IWritableBlock block, ulong va, IMemoryOwner<byte> memoryOwner, bool tracked = false)
+            : this(block, va, memoryOwner.Memory, tracked)
+        {
+            _memoryOwner = memoryOwner;
+        }
+
         public void Dispose()
         {
             if (NeedsWriteback)
@@ -33,6 +41,8 @@ namespace Ryujinx.Memory
                     _block.WriteUntracked(_va, Memory.Span);
                 }
             }
+
+            _memoryOwner?.Dispose();
         }
     }
 }