pkg/report: get only the thread local reports #18714

Job	Run time
gvisor	4m 8s
race_dashboard	2m 41s
dashboard	2m 7s
arch (presubmit_arch_freebsd)	6m 25s
arch (presubmit_arch_openbsd)	3m 55s
race	8m 59s
build	4m 31s
old	7m 26s
arch (presubmit_arch_executor)	3m 20s
arch (presubmit_arch_darwin)	3m 45s
arch (presubmit_arch_netbsd)	3m 52s
arch (presubmit_arch_windows)	3m 44s
arch (presubmit_arch_linux)	11m 3s
aux	4m 8s
	1h 10m 4s

Provide feedback