R1:15c0c895a506

Make upstream callers respect "active bindings" when querying Almanac

Summary: Ref T13641. Make "active bindings" a real query and make callers that only care about active bindings only query for active bindings.

Test Plan:
- Queried for "bindings" and "activeBindings" via Conduit.
- Disabled/enabled devices, saw binding status update in UI.
- Loaded Diffusion cluster layout.
- Grepped for `needBindings()`, `getActiveBindings()`, etc.

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