Remove some obsolete types usage

Author: alex-kulakov

Extensions/Xtensive.Orm.Security/Cryptography/MD5HashingService.cs

@@ -17,10 +17,7 @@ namespace Xtensive.Orm.Security.Cryptography
   public class MD5HashingService : GenericHashingService
   {
     /// <inheritdoc/>
-#pragma warning disable SYSLIB0021 // Type or member is obsolete
-    // direct creation is more efficient than MD5.Create()
-    protected override HashAlgorithm GetHashAlgorithm() => new MD5CryptoServiceProvider();
-#pragma warning restore SYSLIB0021 // Type or member is obsolete
+    protected override HashAlgorithm GetHashAlgorithm() => MD5.Create();
 
     /// <summary>
     /// Initializes a new instance of the <see cref="MD5HashingService"/> class.

Extensions/Xtensive.Orm.Security/Cryptography/SHA1HashingService.cs

@@ -16,10 +16,7 @@ namespace Xtensive.Orm.Security.Cryptography
   public class SHA1HashingService : GenericHashingService
   {
     /// <inheritdoc/>
-#pragma warning disable SYSLIB0021 // Type or member is obsolete
-    // direct creation is more efficient than SHA1.Create()
-    protected override HashAlgorithm GetHashAlgorithm() => new SHA1Managed();
-#pragma warning restore SYSLIB0021 // Type or member is obsolete
+    protected override HashAlgorithm GetHashAlgorithm() => SHA1.Create();
 
     /// <summary>
     /// Initializes a new instance of the <see cref="SHA1HashingService"/> class.

Extensions/Xtensive.Orm.Security/Cryptography/SHA256HashingService.cs

@@ -16,10 +16,7 @@ namespace Xtensive.Orm.Security.Cryptography
   public class SHA256HashingService : GenericHashingService
   {
     /// <inheritdoc/>
-#pragma warning disable SYSLIB0021 // Type or member is obsolete
-    // direct creation is more efficient than SHA256.Create()
-    protected override HashAlgorithm GetHashAlgorithm() => new SHA256Managed();
-#pragma warning restore SYSLIB0021 // Type or member is obsolete
+    protected override HashAlgorithm GetHashAlgorithm() => SHA256.Create();
 
     /// <summary>
     /// Initializes a new instance of the <see cref="SHA256HashingService"/> class.

Extensions/Xtensive.Orm.Security/Cryptography/SHA384HashingService.cs

@@ -16,10 +16,7 @@ namespace Xtensive.Orm.Security.Cryptography
   public class SHA384HashingService : GenericHashingService
   {
     /// <inheritdoc/>
-#pragma warning disable SYSLIB0021 // Type or member is obsolete
-    // direct creation is more efficient than SHA384.Create()
-    protected override HashAlgorithm GetHashAlgorithm() => new SHA384Managed();
-#pragma warning restore SYSLIB0021 // Type or member is obsolete
+    protected override HashAlgorithm GetHashAlgorithm() => SHA384.Create();
 
     /// <summary>
     /// Initializes a new instance of the <see cref="SHA384HashingService"/> class.

Extensions/Xtensive.Orm.Security/Cryptography/SHA512HashingService.cs

@@ -16,10 +16,7 @@ namespace Xtensive.Orm.Security.Cryptography
   public class SHA512HashingService : GenericHashingService
   {
     /// <inheritdoc/>
-#pragma warning disable SYSLIB0021 // Type or member is obsolete
-    // direct creation is more efficient than SHA512.Create()
-    protected override HashAlgorithm GetHashAlgorithm() => new SHA512Managed();
-#pragma warning restore SYSLIB0021 // Type or member is obsolete
+    protected override HashAlgorithm GetHashAlgorithm() => SHA512.Create();
 
     /// <summary>
     /// Initializes a new instance of the <see cref="SHA512HashingService"/> class.

Orm/Xtensive.Orm.Sqlite/Sql.Drivers.Sqlite/ProviderInitializer.cs

@@ -53,17 +53,14 @@ private static Stream GetLibraryStream()
 
     private static string GetLibraryHash()
     {
-#pragma warning disable SYSLIB0021 // Type or member is obsolete
-      // direct creation is more efficient than SHA1.Create()
-      using (var hashProvider = new System.Security.Cryptography.SHA1Managed()) {
+      using (var hashProvider = SHA1.Create()) {
         //hashProvider.Initialize();
         ReadOnlySpan<byte> hashRaw;
         using (var stream = GetLibraryStream()) {
           hashRaw = hashProvider.ComputeHash(stream);
         }
         return new StringBuilder().AppendHexArray(hashRaw[..8]).ToString();
       }
-#pragma warning restore SYSLIB0021 // Type or member is obsolete
     }
 
     private static string GetLibraryFileName(string nativeLibraryCacheFolder, string moduleHash)

Orm/Xtensive.Orm/Orm/Providers/NameBuilder.cs

@@ -579,12 +579,10 @@ public string ApplyNamingRules(string name)
     /// <returns>Computed hash.</returns>
     private static string GetHash(string name)
     {
-#pragma warning disable SYSLIB0021 // Type or member is obsolete
-      using (var hashAlgorithm = new MD5CryptoServiceProvider()) {
+      using (var hashAlgorithm = MD5.Create()) {
         var hash = hashAlgorithm.ComputeHash(Encoding.UTF8.GetBytes(name));
         return $"H{hash[0]:x2}{hash[1]:x2}{hash[2]:x2}{hash[3]:x2}";
       }
-#pragma warning restore SYSLIB0021 // Type or member is obsolete
     }
 
     private static string FormatKeyGeneratorName(string database, string name)