chore: add thread sanitizer and add ub notes #627

Job	Run time
fuzz	1m 47s
Rust nightly (self-hosted, Linux, amd64)	54s
Format check	24s
Rust nightly (self-hosted, Linux, aarch64)	3m 7s
Sanitize address,leak feature	3m 33s
Sanitize address,leak feature arbitrary_precision	4m 4s
Rust stable (self-hosted, Linux, amd64)	1m 23s
Rust stable (self-hosted, Linux, aarch64)	3m 54s
Sanitize address,leak feature sort_keys	4m 28s
Sanitize address,leak feature use_raw	4m 17s
Sanitize address,leak feature utf8_lossy	3m 29s
Sanitize thread feature	2m 3s
Sanitize thread feature arbitrary_precision	1m 58s
Sanitize thread feature sort_keys	1m 59s
Sanitize thread feature use_raw	2m 45s
Sanitize thread feature utf8_lossy	1m 57s
	42m 2s

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