cmd/gomote: add support for groups to puttar and improve interface
cmd/gomote: add support for groups to puttar and improve interface

This change adds support for groups to puttar and modifies the CLI to
accept a single source argument that can accept any valid input (go
revision, URL, local file, etc.).

Fixes golang/go#53273.
For golang/go#53956.

Change-Id: I5505f262ea1a3240d26abd5db349285f2449c719
Reviewed-on: https://go-review.googlesource.com/c/build/+/418934
Run-TryBot: Michael Knyszek <4473450dc5c88f06e1fb787f303d7805ec2aee65@google.com>
Auto-Submit: Michael Knyszek <4473450dc5c88f06e1fb787f303d7805ec2aee65@google.com>
Reviewed-by: Carlos Amedee <ab5e2bca84933118bbc9d48ffaccce3bac4eeb64@golang.org>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

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