Add GetBytes method with name. (#1197)

Author: CorentinPtrl

src/MySqlConnector/MySqlDataReader.cs

@@ -227,6 +227,9 @@ public override bool HasRows
 	public override long GetBytes(int ordinal, long dataOffset, byte[]? buffer, int bufferOffset, int length)
 		=> GetResultSet().GetCurrentRow().GetBytes(ordinal, dataOffset, buffer, bufferOffset, length);
 
+	public long GetBytes(string name, long dataOffset, byte[]? buffer, int bufferOffset, int length)
+		=> GetResultSet().GetCurrentRow().GetBytes(GetOrdinal(name), dataOffset, buffer, bufferOffset, length);
+
 	public override char GetChar(int ordinal) => GetResultSet().GetCurrentRow().GetChar(ordinal);
 	public char GetChar(string name) => GetChar(GetOrdinal(name));