Handle Json ExtensionData in sql translation visitor

Describe the bug Given an object like this:

class MyEntity
{
    public string MyTypedProperty { get; set; }

    [JsonExtensionData]
    public Dictionary<string, System.Text.Json.JsonElement>? ExtensionData { get; set; }
}

Querying against an entity with extensiondata is not possible within a LINQ expression

{l => (Convert(l.ExtensionData.get_Item("MyTest"), Object) == Convert(100, Object))}

Should convert to:

WHERE root["MyTest"] == 100

Instead converts to

WHERE root["ExtensionData"]["MyTest"] == 100

The underlying entity in Cosmos will serialize like this;

{
    "MyTest": 100
}

So it is impossible to query for the “MyTest” field without dropping down to writing raw QueryDefinitions, in which case you do not have the benefit of strongly-typed expressions for the rest of your query

[adityasa]

Hey @onionhammer, I am taking a look at this item. I have looked and approved 2 of your other prs.

[neildsh]

Hello @onionhammer my apologies that the ball was dropped on your other PRs. I will ping the people who were reviewing those PRs, and we will try to get them merged. We can take this particular issue forward once the other PRs have been resolved. Please note that the other PRs will likely not be merged before next week. Thanks.