[FEA] Support UpdateCommand for Delta Lake

[jlowe]

Delta Lake writes can occur in many forms in a query plan. One form is an ExecutedCommandExec with a command of Delta Lake's UpdateCommand. The RAPIDS Accelerator should support Delta Lake writes that use this form in the query plan.

This form appears when using the SQL API to update values in a table, e.g.:

spark.range(10).createOrReplaceTempView("r")
spark.sql("CREATE TABLE d (id BIGINT) USING DELTA")
spark.sql("UPDATE d SET id = id + 100 WHERE id % 2 == 0")