tools/syz-declextract: support attributes on types #16091

Job	Run time
build	6m 43s
aux	4m 7s
gvisor	3m 26s
dashboard	5m 11s
old	7m 5s
race_dashboard	6m 7s
race	9m 52s
arch (presubmit_arch_freebsd)	6m 16s
arch (presubmit_arch_linux)	10m 30s
arch (presubmit_arch_netbsd)	3m 49s
arch (presubmit_arch_windows)	3m 32s
arch (presubmit_arch_openbsd)	3m 44s
arch (presubmit_arch_executor)	3m 21s
arch (presubmit_arch_darwin)	3m 48s
	1h 17m 31s

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