Unhandled exception from generate-table-partitions on an empty table

[nj1973]

Test case:

SQL> create table dvt_test.tab_empty (id number(5), data varchar2(30));

$ data-validation generate-table-partitions -sc ora -tc ora -tbls dvt_test.tab_empty --primary-keys id   --hash '*'   --config-dir "/tmp/empty.yaml" --partition-num 2
Traceback (most recent call last):
...
  File "/home/xyz/professional-services-data-validator/data_validation/partition_builder.py", line 283, in _get_partition_key_filters
    first_elements[1, : len(source_pks)],
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
IndexError: index 1 is out of bounds for axis 0 with size 0

Obviously there's not much we can dio with an empty table but a better exception would make sense.