Update input_size_bytes, input_records, and input_records

[raghumdani]

For rebase and backfill scenarios, we correctly calculate input stats. However, for incremental this will only represent incremental delta stats. Due to this we are having to hack around our way to determine actual data scanned. Updating these audits to allow calculating the total data scanned easy.

1. For rebase, total data scanned (at rest size) is input_size_bytes - untouched_size_bytes.
2. For backfill, total data scanned (at rest size) is input_size_bytes - untouched_size_bytes.
3. For incremental, total_data_scanned (at rest size) is input_size_bytes - untouched_size_bytes.

Hence, we have a single math expression representing data scanned for all the different types of compaction.