Improve JSON output when encountering errors serializing sub-properties

[michael-sterling]

Motivation:

When we encounter an error serializing a property on a context object, other properties still might be useful to the reader. Further, readers might be confused that the serialization error is what caused their test to fail, when in fact the serialization error only happened after the test failed for another reason.

To Repro:

		[Test]
		public void BadPropertySerialization()
		{
			var foo = new FooDto { Id = 1 };

			AssertEx.IsTrue(() => foo == null);
		}

		private sealed class FooDto
		{
			public int Id { get; set; }
			public string Bad => throw new Exception("Bad!");
		}

Expected Output:

Expected:
	foo == null

Actual:
	foo = { Id: 1, Bad: [Newtonsoft.Json.JsonSerializationException: Error getting value from 'Bad' on 'Logos.AccountServices.Tests.IntegrationTests.Accounts.V1.PinTests+FooDto'.] }

Actual Output:

Expected:
	foo == null

Actual:
	foo = <Logos.AccountServices.Tests.IntegrationTests.Accounts.V1.PinTests+FooDto> [Newtonsoft.Json.JsonSerializationException: Error getting value from 'Bad' on 'Logos.AccountServices.Tests.IntegrationTests.Accounts.V1.PinTests+FooDto'.]