[CQ] Use linux x64 debug bot on CQ instead of ia32

NOTRY=true
TBR=sergiyb@chromium.org

Change-Id: I1f7281fdf4144ad192efa6581df3109a0f6abd68
Reviewed-on: https://chromium-review.googlesource.com/1010067Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52569}

infra/config/cq.cfg

@@ -30,9 +30,10 @@ verifiers {
         name: "v8_linux64_asan_rel_ng_triggered"
         triggered_by: "v8_linux64_asan_rel_ng"
       }
+      builders { name: "v8_linux64_dbg_ng" }
       builders {
-        name: "v8_linux64_dbg_ng"
-        experiment_percentage: 100
+        name: "v8_linux64_dbg_ng_triggered"
+        triggered_by: "v8_linux64_dbg_ng"
       }
       builders { name: "v8_linux64_gcc_compile_dbg" }
       builders { name: "v8_linux64_jumbo_compile_rel" }
@@ -65,11 +66,6 @@ verifiers {
         experiment_percentage: 100
       }
       builders { name: "v8_linux_chromium_gn_rel" }
-      builders { name: "v8_linux_dbg_ng" }
-      builders {
-        name: "v8_linux_dbg_ng_triggered"
-        triggered_by: "v8_linux_dbg_ng"
-      }
       builders { name: "v8_linux_gcc_compile_rel" }
       builders { name: "v8_linux_mips64el_compile_rel" }
       builders { name: "v8_linux_mipsel_compile_rel" }