Use Runner

This revamps code quite a bit. Series handling has been moved into the
gerrit client, it also handles caching.

The Runner logic itself has been greatly simplified.

The runner logic has been moved into the runner.go, submitqueue.go is
gone.

The "per-run result object" concept has been dropped - we instead just
use annotated logs.

Also, we switched to apex/log

1 files changed, 45 insertions, 13 deletions

diff --git a/go.sum b/go.sum
index b5f1dd9f9cc1..12ab50bbd053 100644
--- a/go.sum
+++ b/go.sum
@@ -1,55 +1,87 @@
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