Reduce the telemetry proposal template to make it easier to file
telemetry proposals. At a high level, the proposal is just a request to
merge a specific configuration change, so a free text rationale as well
as proposed CL link should suffice. The proposal committee can make sure
that all concerns about new uploading are addressed.
Also, fix links to the chartconfig package documentation, as well as the
config.txt file, and reference the new go.dev/doc/telemetry.
Change-Id: I9eefba14967a18327abfcb2de427dc4bec6d659f
Reviewed-on: https://go-review.googlesource.com/c/go/+/583496
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Robert Findley <rfindley@google.com> Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>