fix: support str_value of Scalar is bool (#56068)

paddle/phi/common/scalar.h

@@ -110,6 +110,12 @@ class ScalarBase {
       data_.f64 = -std::numeric_limits<double>::infinity();
     } else if (str_value == "nan") {
       data_.f64 = std::numeric_limits<double>::quiet_NaN();
+    } else if (str_value == "True") {
+      dtype_ = DataType::BOOL;
+      data_.b = true;
+    } else if (str_value == "Fasle") {
+      dtype_ = DataType::BOOL;
+      data_.b = false;
     } else {
       // NOTE(chenfeiyu): to support subnormal floating point number
       // std::stod cannot handle subnormal values