Azure.Search: Assert.AreAqual not sufficient for comparing static models

[heaths]

While investing #10944 I found that StaticDocuments test was passing despite having the same problem that complex fields like Location were not being serialized and thus coming back null. While Assert.AreEqual works for SearchDocument, it does not for static models like Hotel.

For testing, we could probably implement IEqualityComparer<Hotel> et. al. to pass use, like:

Assert.That(docs[i], Is.EqualTo(SearchResources.TestDocuments[i]).Using(HotelComparerShared));

Or, since it's only test data, just override Equals on Hotel et. al.

This works for dynamic documents because NUnit uses a chained comparer for common types like dictionaries, so works on nested SearchDocuments.

[heaths]

Never mind. The existing equals override was explicitly excluding Location while we wait for a resolution to #10592, but Microsoft.Spatial.GeographyPoint will suffice for now.