Revert "[CQ] Temporarily exclude broken bot from CQ"

This reverts commit d75ecf13.

Reason for revert: outage over

Original change's description:
> [CQ] Temporarily exclude broken bot from CQ
> 
> Bug: chromium:777825
> Change-Id: I1501dba072e1f3448c3464be0ee69aa8b0de305a
> Reviewed-on: https://chromium-review.googlesource.com/735605
> Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48870}

TBR=machenbach@chromium.org,sergiyb@chromium.org

Change-Id: I6ec8d9452aa669be2fd28026fe1e3144c54d5550
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:777825
Reviewed-on: https://chromium-review.googlesource.com/735420Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48879}

infra/config/cq.cfg

@@ -44,15 +44,11 @@ verifiers {
         name: "v8_linux64_asan_rel_ng_triggered"
         triggered_by: "v8_linux64_asan_rel_ng"
       }
-      # TODO(machenbach): https://crbug.com/777825
+      builders { name: "v8_linux64_avx2_rel_ng" }
       builders {
-        name: "v8_linux64_avx2_rel_ng"
-        experiment_percentage: 100
+        name: "v8_linux64_avx2_rel_ng_triggered"
+        triggered_by: "v8_linux64_avx2_rel_ng"
       }
-      #builders {
-      #  name: "v8_linux64_avx2_rel_ng_triggered"
-      #  triggered_by: "v8_linux64_avx2_rel_ng"
-      #}
       builders { name: "v8_linux64_gcc_compile_dbg" }
       builders { name: "v8_linux64_gyp_rel_ng" }
       builders {