Enable replication tests on MacOS

[zachmu]

DNS lookups on GitHub MacOS runners are very slow, which makes some of these test expectations fail. localhost resolves through DNS on MacOS but not on Ubuntu, which doesn't have this problem. This PR changes all localhost definitions in the test to the loopback address instead.

[coffeegoddd]

@zachmu DOLT

read_tests	from_latency	to_latency	percent_change
covering_index_scan	2.35	2.35	0.0
groupby_scan	64.47	65.65	1.83
index_join	1.93	1.93	0.0
index_join_scan	1.32	1.32	0.0
index_scan	200.47	196.89	-1.79
oltp_point_select	0.25	0.26	4.0
oltp_read_only	5.09	5.09	0.0
select_random_points	0.54	0.55	1.85
select_random_ranges	0.68	0.69	1.47
table_scan	196.89	196.89	0.0
types_table_scan	458.96	450.77	-1.78

write_tests	from_latency	to_latency	percent_change
oltp_delete_insert	6.21	6.21	0.0
oltp_insert	3.13	3.13	0.0
oltp_read_write	11.45	11.45	0.0
oltp_update_index	3.3	3.3	0.0
oltp_update_non_index	3.02	3.02	0.0
oltp_write_only	6.32	6.32	0.0
types_delete_insert	6.91	6.91	0.0

[coffeegoddd]

@zachmu DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
c45b5a3	ok	5937471

version	total_tests
c45b5a3	5937471

correctness_percentage
100.0

[coffeegoddd]

@zachmu DOLT

test_name	from_latency_p95	to_latency_p95	percent_change
tpcc-scale-factor-1	44.98	46.63	3.67

test_name	from_server_name	from_server_version	from_tps	to_server_name	to_server_version	to_tps	percent_change
tpcc-scale-factor-1	dolt	ad52ba4	52.81	dolt	c45b5a3	52.79	-0.04

[reltuk]

I'm not sure I love the unconfigurable change to the global DNS resolution timeout. I'm not opposed to the s/localhost/127.*/ and enabling go-sql-server-driver on macOS though. It seems like these tests run just as quickly as on Linux, at least on this PR, which is quite surprising...

[zachmu]

I'm not sure I love the unconfigurable change to the global DNS resolution timeout. I'm not opposed to the s/localhost/127.*/ and enabling go-sql-server-driver on macOS though. It seems like these tests run just as quickly as on Linux, at least on this PR, which is quite surprising...

For now I'll make this a test-only change. We can revisit the DNS timeout at a later date if it matters. The DNS timeouts seemed to mostly be an artifact of the GitHub runners, I could never repro on my own Macbook.

[reltuk]

LGTM!