Changing database init/drop hooks to be a slice of hooks

[fulghum]

The Dolt database provider currently has a single init hook and a single drop hook. We have a few hooks, and in order to support multiple hooks, we chain them together. Binlog replication will also need to register a similar init and drop hook to capture database create/drop actions, so to prepare for that, this PR turns the single init hook and single drop hook into a slice of init hooks and a slice of drop hooks.

[coffeegoddd]

@fulghum DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
7e651ef	ok	5937457

version	total_tests
7e651ef	5937457

correctness_percentage
100.0

[coffeegoddd]

@fulghum DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
6056d23	ok	5937457

version	total_tests
6056d23	5937457

correctness_percentage
100.0

[zachmu]

LGTM, no notes

[github-actions]

@max-hoffman DOLT

test_name	detail	row_cnt	sorted	mysql_time	sql_mult	cli_mult
batching	LOAD DATA	10000	1	0.06	1.17
batching	batch sql	10000	1	0.07	2
batching	by line sql	10000	1	0.07	2
blob	1 blob	200000	1	0.93	3.97	4.31
blob	2 blobs	200000	1	0.9	4.91	5.28
blob	no blob	200000	1	0.91	2.07	2.13
col type	datetime	200000	1	0.82	2.6	2.8
col type	varchar	200000	1	0.69	2.93	2.96
config width	2 cols	200000	1	0.76	2.5	2.34
config width	32 cols	200000	1	1.82	1.81	2.58
config width	8 cols	200000	1	0.99	1.99	2.78
pk type	float	200000	1	0.9	1.84	1.97
pk type	int	200000	1	0.86	1.95	2.12
pk type	varchar	200000	1	1.65	1.35	1.38
row count	1.6mm	1600000	1	5.61	2.49	2.61
row count	400k	400000	1	1.41	2.43	2.55
row count	800k	800000	1	2.9	2.39	2.52
secondary index	four index	200000	1	3.65	1.27	1.08
secondary index	no secondary	200000	1	0.91	2.07	2.15
secondary index	one index	200000	1	1.15	2.08	2.16
secondary index	two index	200000	1	2.01	1.54	1.44
sorting	shuffled 1mm	1000000	0	5.59	2.34	2.39
sorting	sorted 1mm	1000000	1	5.39	2.4	2.46

[github-actions]

@max-hoffman DOLT

name	detail	mean_mult
dolt_blame_basic	system table	1.24
dolt_blame_commit_filter	system table	3.26
dolt_commit_ancestors_commit_filter	system table	0.84
dolt_commits_commit_filter	system table	0.91
dolt_diff_log_join_from_commit	system table	2.13
dolt_diff_log_join_to_commit	system table	2.12
dolt_diff_table_from_commit_filter	system table	1.1
dolt_diff_table_to_commit_filter	system table	1.1
dolt_diffs_commit_filter	system table	1
dolt_history_commit_filter	system table	1.17
dolt_log_commit_filter	system table	0.94

[github-actions]

@coffeegoddd DOLT

test_name	detail	row_cnt	sorted	mysql_time	sql_mult	cli_mult
batching	LOAD DATA	10000	1	0.06	1.17
batching	batch sql	10000	1	0.08	1.75
batching	by line sql	10000	1	0.08	1.75
blob	1 blob	200000	1	0.88	4.17	4.65
blob	2 blobs	200000	1	0.88	5.09	5.76
blob	no blob	200000	1	0.89	2.11	2.22
col type	datetime	200000	1	0.8	2.75	2.91
col type	varchar	200000	1	0.67	3.12	3.31
config width	2 cols	200000	1	0.77	2.21	2.35
config width	32 cols	200000	1	1.87	1.81	2.56
config width	8 cols	200000	1	0.97	2.05	2.34
pk type	float	200000	1	0.86	2	2.12
pk type	int	200000	1	0.79	2.49	2.25
pk type	varchar	200000	1	1.51	1.5	1.67
row count	1.6mm	1600000	1	5.57	2.54	2.68
row count	400k	400000	1	1.41	2.43	2.62
row count	800k	800000	1	2.8	2.48	2.65
secondary index	four index	200000	1	3.6	1.28	1.12
secondary index	no secondary	200000	1	0.92	2.03	2.21
secondary index	one index	200000	1	1.15	2.11	2.2
secondary index	two index	200000	1	2.02	1.55	1.55
sorting	shuffled 1mm	1000000	0	5.17	2.54	2.64
sorting	sorted 1mm	1000000	1	5.26	2.49	2.59

[github-actions]

@coffeegoddd DOLT

name	detail	mean_mult
dolt_blame_basic	system table	1.24
dolt_blame_commit_filter	system table	3.23
dolt_commit_ancestors_commit_filter	system table	0.86
dolt_commits_commit_filter	system table	0.91
dolt_diff_log_join_from_commit	system table	2.05
dolt_diff_log_join_to_commit	system table	2.07
dolt_diff_table_from_commit_filter	system table	1.1
dolt_diff_table_to_commit_filter	system table	1.12
dolt_diffs_commit_filter	system table	0.97
dolt_history_commit_filter	system table	1.17
dolt_log_commit_filter	system table	0.94

[github-actions]

@coffeegoddd DOLT

name	add_cnt	delete_cnt	update_cnt	latency
adds_only	60000	0	0	0.71
adds_updates_deletes	60000	60000	60000	3.76
deletes_only	0	60000	0	1.87
updates_only	0	0	60000	2.4