[build] Add MB configs for new TSAN builder

TBR=sergiyb@chromium.org
NOTRY=true
NOTREECHECKS=true

Bug: v8:7012
Change-Id: I5895fcda768696c90f3f766d4beef6f75ec9f79f
Reviewed-on: https://chromium-review.googlesource.com/763530
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49295}

infra/mb/mb_config.pyl

@@ -135,6 +135,7 @@
           'gn_release_simulate_arm64_msan_no_origins_edge',
       'V8 Linux MSAN chained origins':
           'gn_release_simulate_arm64_msan_edge',
+      'V8 Linux64 TSAN - release builder': 'gn_release_x64_tsan',
       'V8 Linux64 UBSanVptr - release builder':
           'gn_release_x64_ubsan_vptr_recover_edge',
     },