Add derivation defintions and values to OpenMCT plugin

[nttoole]

Issue: OpenMCT plugin only sends a packet's fields, but not its derivations.

Fix: Update OpenMct to include derivations in both

1. the telemetry dictionary definition
2. a packet instance

More details:

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1. Update the section that converts to the telemetry dictionary into an OpenMCT JSON structure https://github.com/NASA-AMMOS/AIT-Core/blob/184d8bec62c274627ffd1bc488f4e70555caf8e7/ait/core/server/plugins/openmct.py#L215

I suspect there is enough commonality between fields and derivation objects (name, units, type) that you could just add another loop that iterates over a packet-def’s derivationmap, almost a parallel of what it does for fieldmap: https://github.com/NASA-AMMOS/AIT-Core/blob/184d8bec62c274627ffd1bc488f4e70555caf8e7/ait/core/server/plugins/openmct.py#L226

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2. Update the section that converts a telemetry packet https://github.com/NASA-AMMOS/AIT-Core/blob/184d8bec62c274627ffd1bc488f4e70555caf8e7/ait/core/server/plugins/openmct.py#L207

Similar to part 1, add a second loop the parallels fieldmap but for derivationmap.