[release-branch.go1.23] runtime: don't frob isSending for tickers
The Ticker Stop and Reset methods don't report a value,
so we don't need to track whether they are interrupting a send.
This includes a test that used to fail about 2% of the time on
my laptop when run under x/tools/cmd/stress.
For #69880
Fixes #69882
Change-Id: Ic6d14b344594149dd3c24b37bbe4e42e83f9a9ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/620136
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
(cherry picked from commit
48849e0866f64a40d04a9151e44e5a73acdfc17b)
Reviewed-on: https://go-review.googlesource.com/c/go/+/620137
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>