go/utils/publishrelease: Bump MUSL toolchains used for cutting releases.

[reltuk]

The new toolchain uses MUSL + mimalloc.

Include the mimalloc license in our released LICENSES notice.

[coffeegoddd]

@reltuk DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
4f9bdd9	ok	5937457

version	total_tests
4f9bdd9	5937457

correctness_percentage
100.0

[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	0.07	1.86
batching	by line sql	10000	1	0.07	1.71
blob	1 blob	200000	1	0.94	3.9	4.28
blob	2 blobs	200000	1	0.91	4.91	5.31
blob	no blob	200000	1	0.88	2.13	2.14
col type	datetime	200000	1	0.82	2.61	2.83
col type	varchar	200000	1	0.7	3.04	3.14
config width	2 cols	200000	1	0.77	2.48	2.21
config width	32 cols	200000	1	1.86	1.82	2.56
config width	8 cols	200000	1	0.96	2.11	2.26
pk type	float	200000	1	0.9	1.91	2
pk type	int	200000	1	0.77	2.14	2.22
pk type	varchar	200000	1	1.6	1.38	1.36
row count	1.6mm	1600000	1	5.6	2.5	2.53
row count	400k	400000	1	1.43	2.4	2.42
row count	800k	800000	1	2.81	2.46	2.49
secondary index	four index	200000	1	3.54	1.3	1.11
secondary index	no secondary	200000	1	0.92	2.04	2.05
secondary index	one index	200000	1	1.16	2.08	2.09
secondary index	two index	200000	1	2	1.58	1.45
sorting	shuffled 1mm	1000000	0	5.57	2.42	2.38
sorting	sorted 1mm	1000000	1	5.49	2.44	2.4

[github-actions]

@coffeegoddd DOLT

name	detail	mean_mult
dolt_blame_basic	system table	1.28
dolt_blame_commit_filter	system table	3.41
dolt_commit_ancestors_commit_filter	system table	0.81
dolt_commits_commit_filter	system table	0.91
dolt_diff_log_join_from_commit	system table	2.12
dolt_diff_log_join_to_commit	system table	2.13
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	1.03
dolt_history_commit_filter	system table	1.22
dolt_log_commit_filter	system table	0.91

[github-actions]

@coffeegoddd DOLT

name	add_cnt	delete_cnt	update_cnt	latency
adds_only	60000	0	0	0.73
adds_updates_deletes	60000	60000	60000	3.8
deletes_only	0	60000	0	1.87
updates_only	0	0	60000	2.42