json: follow up for not existing members

[paule96]

Note: this is a new topic to the issue #952

In my opinion their are still two unresolved edge cases.
The first edge case is when any property is null in the source object like that:

private JsonDocument _jsonDoc = JsonDocument.Parse
(
    """
        [
            {
                "a": "1",
                "b": 2,
                "c": true,
                "d": null
            },

            {
                "a": "12",
                "b": 22,
                "c": true,
                "d": null
            }
        ]
        """
);

Then any query of the test in your tests is then red:

https://github.com/zzzprojects/System.Linq.Dynamic.Core/blob/aa47b50f1da56ddb2eb4dc7b24320684a53ab18e/test/System.Linq.Dynamic.Core.SystemTextJson.Tests/SystemTextJsonTests.cs#L540C4-L560C6

The second broken case is if you compare some number to a not exisiting member to be bigger then the not existing member, then it will return true.

So something like that:

_source.Any(config, $"x => x.notExisting < 1"); // The result will be a not empty list

[StefH]

Case 1
This only happens for System.Text.Json, NewtonSoft is ok.
This is fixed in #961

[StefH]

Case 2, is also fixed I hope
#962