cmd/release: do not set ACLs on objects when uploading
cmd/release: do not set ACLs on objects when uploading

This change removes the explicit setting of files uploaded during the
release process. The bucket where the files are being uploaded to now
use uniform bucket-level access which defines an ACL for all objects
in the bucket. Any attempt to set an ACL will end with a failure.

Fixes golang/go#46028

Change-Id: If2b291a4b5ee94b75cf73113f3afe8b65a002cf5
Reviewed-on: https://go-review.googlesource.com/c/build/+/317809
Trust: Carlos Amedee <ab5e2bca84933118bbc9d48ffaccce3bac4eeb64@golang.org>
Run-TryBot: Carlos Amedee <ab5e2bca84933118bbc9d48ffaccce3bac4eeb64@golang.org>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>
Reviewed-by: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>

golang/build,golang/build,golang/build,golang/build