Use one shot pbkdf2 (#31200)

* Use one shot pbkdf2

* Update NetCorePbkdf2Provider.cs

* CR feedback

* CR feedback

* Fix

* Just use GetBytes for now

* Update NetCorePbkdf2Provider.cs

Author: HaoK

src/DataProtection/Cryptography.KeyDerivation/src/PBKDF2/NetCorePbkdf2Provider.cs

@@ -54,11 +54,7 @@ private static byte[] DeriveKeyImpl(string password, byte[] salt, KeyDerivationP
                     throw new ArgumentOutOfRangeException();
             }
 
-            var passwordBytes = Encoding.UTF8.GetBytes(password);
-            using (var rfc = new Rfc2898DeriveBytes(passwordBytes, salt, iterationCount, algorithmName))
-            {
-                return rfc.GetBytes(numBytesRequested);
-            }
+            return Rfc2898DeriveBytes.Pbkdf2(Encoding.UTF8.GetBytes(password), salt, iterationCount, algorithmName, numBytesRequested);
         }
     }
 }