Fuzz

Depend on bitcoin `v0.32.0-rc` #413

Job	Run time
fuzz (roundtrip_semantic)	2m 44s
fuzz (parse_descriptor)	2m 50s
fuzz (parse_descriptor_secret)	4m 9s
fuzz (roundtrip_miniscript_script)	2m 54s
fuzz (roundtrip_miniscript_str)	2m 39s
fuzz (roundtrip_descriptor)	2m 59s
fuzz (roundtrip_concrete)	2m 43s
fuzz (compile_descriptor)	2m 42s
verify-execution	4s
	23m 44s

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