pkg/report: get only the thread local reports #18972

Job	Run time
race	7m 21s
race_dashboard	2m 48s
aux	4m 35s
build	3m 48s
dashboard	2m 55s
old	7m 5s
arch (presubmit_arch_openbsd)	3m 37s
arch (presubmit_arch_netbsd)	3m 55s
arch (presubmit_arch_windows)	3m 35s
arch (presubmit_arch_linux)	10m 51s
arch (presubmit_arch_freebsd)	6m 19s
arch (presubmit_arch_executor)	3m 25s
gvisor	3m 43s
arch (presubmit_arch_darwin)	3m 46s
	1h 7m 43s

Provide feedback