Add SimInfos as hostlabels for migrating cellular suites

SimInfos is a list of SimInfo, converting as hostlabels

BUG=b:317121870
TEST=Unit tests

Change-Id: Ieba8987b91b70901b48a71c8e2094194888dfa90
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5190608
Reviewed-by: Derek Beckett <dbeckett@chromium.org>
Commit-Queue: Varun Srivastav <varunsrivastav@google.com>
Tested-by: Varun Srivastav <varunsrivastav@google.com>
(cherry picked from commit 8e5df5d72410262774a2ec034d3acb6f79798c34)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5314741
Auto-Submit: Varun Srivastav <varunsrivastav@google.com>