This decouples dictionary IDs that end up in IPC from the schema further
because the dictionary tracker always first gathers the dict ID for each
field whether it is pre-defined and preserved or not.

Then when actually writing the IPC bytes the dictionary ID is always
taken from the dictionary tracker as opposed to falling back to the
`Field` of the `Schema`.

When dictionary IDs are not preserved, then they are assigned depth
first, however, when reading them from the dictionary tracker to write
the IPC bytes, they were previously read from the dictionary tracker in
the order that the schema is traversed (first come first serve), which
caused an incorrect order of dictionaries serialized in IPC.

Refine IpcSchemaEncoder API and docs