[Analysis] fixed validation error not displayed in new rule
[Analysis] fixed validation error not displayed in new rule

Bug: b/243859800
Change-Id: I0749048a163310cac15b1d50ff3db7be081b2880
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/3899658
Commit-Queue: Mostafa Draz <7b81ae8b1dca67df482569a93cd01323d3ec59a1@google.com>
Reviewed-by: Patrick Meiring <496ae7b7898d641db15cbb7f3340e9390316ae10@google.com>

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