Rewrite Java API Table.readJSON to return the output from libcudf read_json directly

[ttnghia]

With this PR, Table.readJSON will return the output from libcudf read_json directly without the need of reordering the columns to match with the input schema, as well as generating all-nulls columns for the ones in the input schema that do not exist in the JSON data. This is because libcudf read_json already does these thus we no longer have to do it.

Depends on:

• Add optional column_order in JSON reader #17029

Partially contributes to NVIDIA/spark-rapids#11560.
Closes #17002

[revans2]

I love this change. My biggest problem is that this is a breaking change.

I put in a number of changes into the Spark Plugin to provide the emptyRowCount and fully removing those changes is not simple. So either please make sure that this provides some backwards compatibility so we can make the change in a few steps or can we please have the other PR ready to go so that there is very little down time between the two.

[ttnghia]

Changed to non-breaking as the old Java methods are not removed in this PR. We can remove them later on when all the plugin code complete their adaptation.

[ttnghia]

After this (with #17029), the overhead of reordering columns is significantly reduced (above is before this, and below is with this):

[ttnghia]

/merge