Unskip a dataloader BATS test now that a unique index bug was fixed

[fulghum]

No description provided.

[github-actions]

	Main	PR
covering_index_scan_postgres	354.80/s	352.49/s	-0.7%
index_join_postgres	155.17/s	154.10/s	-0.7%
index_join_scan_postgres	183.16/s	184.74/s	+0.8%
index_scan_postgres	12.22/s	12.17/s	-0.5%
oltp_point_select	2776.22/s	2773.36/s	-0.2%
oltp_read_only	1863.24/s	1852.85/s	-0.6%
select_random_points	110.76/s	111.16/s	+0.3%
select_random_ranges	132.06/s	132.26/s	+0.1%
table_scan_postgres	10.03/s	9.87/s	-1.6%
types_table_scan_postgres	5.30/s	5.18/s	-2.3%

[github-actions]

	Main	PR
Total	42090	42090
Successful	15687	15687
Failures	26403	26403
Partial Successes1	5216	5216

	Main	PR
Successful	37.2701%	37.2701%
Failures	62.7299%	62.7299%

Footnotes

1. These are tests that we're marking as Successful, however they do not match the expected output in some way. This is due to small differences, such as different wording on the error messages, or the column names being incorrect while the data itself is correct. ↩

[zachmu]

LGTM