Fix JsonException message property type info in class parameterized constructor

[XeronOwO]

This pull request fixes an incorrect type hint in the thrown JsonException when deserialization fails for classes with parameterized constructors.

Reproduction

using System.Text.Json;

Test<NormalClass>();
Test<ParameterizedNormalClass>();
Test<RecordClass>();
Test<NormalStruct>();
Test<ParameterizedNormalStruct>();
Test<RecordStruct>();

static void Test<T>()
{
	try
	{
		JsonSerializer.Deserialize<T>("{\"Text\":{}}"); // create json convert exception manually
	}
	catch (Exception e)
	{
		Console.WriteLine(e.Message);
	}
}

class NormalClass
{
	public string Text { get; set; } = null!;
}

class ParameterizedNormalClass(string text)
{
	public string Text { get; set; } = text;
}

record RecordClass(string Text);

struct NormalStruct()
{
	public string Text { get; set; } = null!;
}

struct ParameterizedNormalStruct(string text)
{
	public string Text { get; set; } = text;
}

record struct RecordStruct(string Text);

Expected Output

The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.

Actual Output

The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to ParameterizedNormalClass. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to RecordClass. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.
The JSON value could not be converted to System.String. Path: $.Text | LineNumber: 0 | BytePositionInLine: 9.

Root Cause

For classes with parameterized constructors, state.Current.CtorArgumentState.JsonParameterInfo was used instead of state.Current.JsonPropertyInfo.
(All structs, including parameterized structs and record structs, work correctly without this issue.)

runtime/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Object/ObjectWithParameterizedConstructorConverter.cs

Lines 636 to 642 in 3f14c31

	jsonParameterInfo = jsonPropertyInfo.AssociatedParameter;
	if (jsonParameterInfo != null)
	{
	state.Current.JsonPropertyInfo = null;
	state.Current.CtorArgumentState!.JsonParameterInfo = jsonParameterInfo;
	state.Current.NumberHandling = jsonParameterInfo.NumberHandling;

As a result, the exception message fell back to state.Current.JsonTypeInfo.Type for affected classes.

runtime/src/libraries/System.Text.Json/src/System/Text/Json/ThrowHelper.Serialization.cs

Lines 542 to 544 in 3f14c31

	// Use a default message.
	Type propertyType = state.Current.JsonPropertyInfo?.PropertyType ?? state.Current.JsonTypeInfo.Type;
	message = SR.Format(SR.DeserializeUnableToConvertValue, propertyType);

Fix

Added logic to retrieve type information from state.Current.CtorArgumentState.JsonParameterInfo.ParameterType, ensuring correct type resolution for classes with parameterized constructors.