infra: Migrate builders to Goma RBE (Week 8)

CI builders migrated:
- TSAN Release
- TSAN Debug

Bug: 950413
Change-Id: Ief5b6cf0113ea507a6f318a7761eedcb5bac7acd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1724678
Auto-Submit: Fumitoshi Ukai <ukai@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682309}

infra/config/cr-buildbucket.cfg

@@ -2489,6 +2489,7 @@ buckets {
       mixins: "fuzz-ci"
       mixins: "linux-xenial"
       mixins: "builderless"
+      mixins: "goma-rbe-prod"
     }
     builders {
       name: "Linux CFI"
@@ -2531,6 +2532,7 @@ buckets {
       mixins: "fuzz-ci"
       mixins: "linux-xenial"
       mixins: "builderless"
+      mixins: "goma-rbe-prod"
     }
     builders {
       name: "UBSan vptr Release"

infra/config/luci-milo.cfg

@@ -3074,6 +3074,16 @@ consoles {
     category: "week7|msan"
     short_name: "none"
   }
+  builders {
+    name: "buildbucket/luci.chromium.ci/TSAN Release"
+    category: "week8|tsan"
+    short_name: "rel"
+  }
+  builders {
+    name: "buildbucket/luci.chromium.ci/TSAN Debug"
+    category: "week8|tsan"
+    short_name: "dbg"
+  }
 }
 
 consoles {