SELECT ... INTO OUTFILE ... tests

[jycor]

This PR adds BATS tests for a SELECT ... INTO OUTFILE ... feature we're adding.

Companion pr: dolthub/go-mysql-server#2317

[coffeegoddd]

@jycor DOLT

comparing_percentages
99.999562 to 99.999562

version	result	total
0b0009c	not ok	26
0b0009c	ok	5937431

version	total_tests
0b0009c	5937457

correctness_percentage
99.999562

[coffeegoddd]

@jycor DOLT

comparing_percentages
99.999562 to 99.999562

version	result	total
285f77e	not ok	26
285f77e	ok	5937431

version	total_tests
285f77e	5937457

correctness_percentage
99.999562

[coffeegoddd]

@jycor DOLT

comparing_percentages
99.999562 to 99.999562

version	result	total
81aff65	not ok	26
81aff65	ok	5937431

version	total_tests
81aff65	5937457

correctness_percentage
99.999562

[fulghum]

Looks good, although we should add the new TestSelectIntoFile function into dolt_engine_test.go, too.

[coffeegoddd]

@jycor DOLT

comparing_percentages
99.999562 to 99.999562

version	result	total
fe5547d	not ok	26
fe5547d	ok	5937431

version	total_tests
fe5547d	5937457

correctness_percentage
99.999562

[coffeegoddd]

@jycor DOLT

comparing_percentages
99.999562 to 99.999562

version	result	total
476c04e	not ok	26
476c04e	ok	5937431

version	total_tests
476c04e	5937457

correctness_percentage
99.999562

[github-actions]

@coffeegoddd DOLT

test_name	detail	row_cnt	sorted	mysql_time	sql_mult	cli_mult
batching	LOAD DATA	10000	1	0.06	0.5
batching	batch sql	10000	1	0.07	1.43
batching	by line sql	10000	1	0.07	1.57
blob	1 blob	200000	1	0.89	3.22	3.54
blob	2 blobs	200000	1	0.88	4.09	4.74
blob	no blob	200000	1	0.89	1.27	1.39
col type	datetime	200000	1	0.81	1.77	1.99
col type	varchar	200000	1	0.69	1.94	1.93
config width	2 cols	200000	1	0.79	1.22	1.29
config width	32 cols	200000	1	1.87	1.42	2.51
config width	8 cols	200000	1	1	1.29	1.54
pk type	float	200000	1	0.89	1.17	1.17
pk type	int	200000	1	0.81	1.17	1.25
pk type	varchar	200000	1	1.54	1.14	0.94
row count	1.6mm	1600000	1	5.73	1.44	1.5
row count	400k	400000	1	1.47	1.36	1.42
row count	800k	800000	1	2.9	1.4	1.47
secondary index	four index	200000	1	3.66	1.03	0.89
secondary index	no secondary	200000	1	0.9	1.23	1.37
secondary index	one index	200000	1	1.15	1.42	1.43
secondary index	two index	200000	1	2.03	1.18	1.09
sorting	shuffled 1mm	1000000	0	5.25	1.71	1.75
sorting	sorted 1mm	1000000	1	5.25	1.73	1.74

[github-actions]

@coffeegoddd DOLT

name	detail	mean_mult
dolt_blame_basic	system table	1.38
dolt_blame_commit_filter	system table	3.57
dolt_commit_ancestors_commit_filter	system table	0.82
dolt_commits_commit_filter	system table	0.94
dolt_diff_log_join_from_commit	system table	1.74
dolt_diff_log_join_to_commit	system table	1.72
dolt_diff_table_from_commit_filter	system table	1.15
dolt_diff_table_to_commit_filter	system table	1.19
dolt_diffs_commit_filter	system table	1.06
dolt_history_commit_filter	system table	1.47
dolt_log_commit_filter	system table	0.94