[bq] Trim the field description if it's too long
[bq] Trim the field description if it's too long

Change-Id: Ifa5c0ce6bbeb114ca2af8e5718cf7a54191bfc85
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/3405643
Reviewed-by: Scott Lee <1dcb292530f82960316cb3d87cd67c3f212b79cb@chromium.org>
Reviewed-by: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Commit-Queue: Chan Li <332b6c56634d0f63001046c664a2370006a02420@chromium.org>

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go