Query: Allow non-deterministic runtime constants to be evaluated once per query

[smitpatel]

This can be used when non-deterministic runtime constant like Datetime.Now are used in the query but due to them being composed over, we cannot evaluate them on server in main query.

We can either evaluate DateTime.Now on client or run a command to get the value first (we would need to fix #11466), then pass the value to query as parameter to generate actual results.

[divega]

This affects DateTime.Now and friends now, but it may affect other non-deterministic functions, either in providers or user mapped.

[divega]

Superseded by #12672.