benchmark: upgrade in-root benchmarks

This CL updates all in-root benchmarks

Updates #80564.

Change-Id: I7749ec7106e6ee2284a13e1734e0096cd4a8fab0
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/806160
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>