Remove default decimal parameters in C++ SDK (#9969)

Author: azevaykin

ydb/public/sdk/cpp/client/ydb_value/value.h

@@ -224,7 +224,7 @@ class TTypeBuilder : public TMoveOnly {
 struct TDecimalValue {
     TString ToString() const;
     TDecimalValue(const Ydb::Value& decimalValueProto, const TDecimalType& decimalType);
-    TDecimalValue(const TString& decimalString, ui8 precision = 22, ui8 scale = 9);
+    TDecimalValue(const TString& decimalString, ui8 precision, ui8 scale);
 
     TDecimalType DecimalType_;
     ui64 Low_;