runtime: ensure at least 1 tick between events
runtime: ensure at least 1 tick between events

ticks might be same after tick division, although the real cputicks
is linear growth

Fixes #46737

Change-Id: I1d98866fbf21b426c6c1c96cc9cf802d7f440f18
Reviewed-on: https://go-review.googlesource.com/c/go/+/330849
Trust: Meng Zhuo <3e6d300a356a3b86bc195677414a9ec5508ca893@golangcn.org>
Trust: Bryan C. Mills <1c8aad60184261ccede67f5c63a0d2a3bf3c9ff4@google.com>
Run-TryBot: Meng Zhuo <3e6d300a356a3b86bc195677414a9ec5508ca893@golangcn.org>
Reviewed-by: Michael Knyszek <4473450dc5c88f06e1fb787f303d7805ec2aee65@google.com>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

CAFxX/go,CAFxX/go,nawawi/go,golang/go,cloudflare/go,golang/go,cloudflare/go,cloudflare/go,cloudflare/go,cloudflare/go,CAFxX/go,golang/go,cloudflare/go,cloudflare/go,cloudflare/go,nawawi/go,golang/go,CAFxX/go,golang/go,nawawi/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,nawawi/go,golang/go,CAFxX/go,CAFxX/go