[#39] Client: add memory usage optimizations

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.Cryptography/Extentions.cs

@@ -1,6 +1,7 @@
+using System;
 using System.Security.Cryptography;
 using System.Threading;
-
+using CommunityToolkit.HighPerformance;
 using Org.BouncyCastle.Crypto.Digests;
 
 namespace FrostFS.SDK.Cryptography;
@@ -35,7 +36,27 @@ public static class Extentions
         finally
         {
             if (lockTaken)
+            {
                 _spinlockSha256.Exit(false);
+            }
+        }
+    }
+
+    public static byte[] Sha256(this ReadOnlyMemory<byte> value)
+    {
+        bool lockTaken = false;
+        try
+        {
+            _spinlockSha256.Enter(ref lockTaken);
+
+            return _sha256.ComputeHash(value.AsStream());
+        }
+        finally
+        {
+            if (lockTaken)
+            {
+                _spinlockSha256.Exit(false);
+            }
         }
     }