Add missing Table methods to gRPC

[chipkent]

While assessing the Python client API and designing the Python server API, it was discovered that the gRPC table API is incomplete. This request is to complete the gRPC API. I assume completion of this request will trigger tickets to implement these features in the JavaScript, Python, Java, and C++ client APIs.

Known missing table operations are:

• moveColumns
• moveDownColumns -- If we are doing this from scratch moveColumnsDown seems like a better name.
• moveUpColumns -- If we are doing this from scratch moveColumnsUp seems like a better name.
• renameColumns
• headPct
• tailPct
• snapshotHistory

Known missing aggregations are:

• AggCountDistinct
• AggDistinct
• AggFormula
• AggSortedFirst
• AggSortedLast
• AggUnique
• AggWSum

[rcaudy]

We should not port renameColumns. It should just be a kind of view. The same change is overdue on the engine side.

[rcaudy]

I think all of the move operations can also just be views. No need to add complexity to the gRPC API for them.

[devinrsmith]

Related to https://github.com/deephaven/deephaven-core/issues/711

[devinrsmith]

Related to https://github.com/deephaven/deephaven-core/issues/991