add go and r tests in postgres client tests

[jennifersp]

No description provided.

[github-actions]

	Main	PR
covering_index_scan_postgres	1902.96/s	1822.54/s	-4.3%
groupby_scan_postgres	134.83/s	137.60/s	+2.0%
index_join_postgres	647.97/s	650.52/s	+0.3%
index_join_scan_postgres	796.99/s	803.65/s	+0.8%
index_scan_postgres	25.02/s	24.86/s	-0.7%
oltp_delete_insert_postgres	778.44/s	766.73/s	-1.6%
oltp_insert	659.85/s	665.62/s	+0.8%
oltp_point_select	2900.98/s	2886.63/s	-0.5%
oltp_read_only	2923.36/s	2940.07/s	+0.5%
oltp_read_write	2311.69/s	2334.85/s	+1.0%
oltp_update_index	705.55/s	715.69/s	+1.4%
oltp_update_non_index	725.91/s	723.35/s	-0.4%
oltp_write_only	1728.09/s	1734.06/s	+0.3%
select_random_points	1851.42/s	1867.85/s	+0.8%
select_random_ranges	1073.89/s	1107.62/s	+3.1%
table_scan_postgres	23.25/s	23.25/s	0.0%
types_delete_insert_postgres	755.58/s	749.59/s	-0.8%
types_table_scan_postgres	8.13/s	8.12/s	-0.2%

[github-actions]

	Main	PR
Total	42090	42090
Successful	18269	18269
Failures	23821	23821
Partial Successes1	5333	5333

	Main	PR
Successful	43.4046%	43.4046%
Failures	56.5954%	56.5954%

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. ↩

[Hydrocharged]

LGTM!