pkg/report: improve "Bad page state" parsing #14407

Job	Run time
dashboard	3m 3s
arch (presubmit_arch_linux)	10m 35s
build	10m 57s
arch (presubmit_arch_freebsd)	6m 36s
aux	4m 42s
gvisor	4m 3s
arch (presubmit_arch_netbsd)	4m 15s
old	6m 27s
arch (presubmit_arch_openbsd)	4m 13s
race	8m 0s
arch (presubmit_arch_darwin)	4m 10s
race_dashboard	3m 4s
arch (presubmit_arch_windows)	3m 18s
arch (presubmit_arch_executor)	3m 9s
	1h 16m 32s

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