Continuous integration

chore: Update `bitcoin` to `0.31.2` #1560

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Run time

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Job	Run time
integration_tests_prepare	1m 30s
lint	1m 5s
rustfmt-check	16s
no-std lint	32s
sample-test	2m 17s
unit-tests	1m 18s
integration-tests	0s
	6m 58s