[tools] Explicitly mark presubmit builder as non-reusable

This does not change the behavior, just makes it more explicit rather than
relying on the "presubmit" string being present in the builder name, which is
about to be deprecated.

R=machenbach@chromium.org, tandrii@chromium.org

No-Try: true
No-Tree-Checks: true
Bug: chromium:893955
Change-Id: I99724b42510a93012dd40e338b1ff8f4047c1276
Reviewed-on: https://chromium-review.googlesource.com/c/1280582Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56685}

infra/config/cq.cfg

@@ -89,7 +89,10 @@ verifiers {
         triggered_by: "v8_mac64_rel_ng"
       }
       builders { name: "v8_node_linux64_rel" }
-      builders { name: "v8_presubmit" }
+      builders {
+        name: "v8_presubmit"
+        disable_reuse: true
+      }
       builders { name: "v8_win64_msvc_compile_rel" }
       builders { name: "v8_win64_rel_ng" }
       builders {