[milo] Swallow malformed build errors in builder page
[milo] Swallow malformed build errors in builder page

This allows the builder page to continue loading even if some builds are malformed.

Bug: 934211
Change-Id: I086dc4923afab5f4836c60bdfa4c7de4a6ec5dce
Reviewed-on: https://chromium-review.googlesource.com/c/1480674
Commit-Queue: Ryan Tseng <2190fe9a39b4920ec7bd59c848ec5cccd163056f@chromium.org>
Reviewed-by: Sergiy Belozorov <aadb4a11584aa9878242ea5d9e4b7e3429654579@chromium.org>
Reviewed-by: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>

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