cmd/gomote: add support for groups to destroy
cmd/gomote: add support for groups to destroy

For golang/go#53956.

Change-Id: I0239d4de773d9e6cc1a505efbb5aba2e62170e3d
Reviewed-on: https://go-review.googlesource.com/c/build/+/418275
Run-TryBot: Michael Knyszek <4473450dc5c88f06e1fb787f303d7805ec2aee65@google.com>
Reviewed-by: Carlos Amedee <ab5e2bca84933118bbc9d48ffaccce3bac4eeb64@golang.org>
Auto-Submit: Michael Knyszek <4473450dc5c88f06e1fb787f303d7805ec2aee65@google.com>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

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