[build] Ensure release bots run with dchecks off

Bug: chromium:1231890
Change-Id: I5db7576542265eadb92ff8cf6cf89870719bba18
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3048180
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Liviu Rau <liviurau@chromium.org>
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75889}

infra/mb/mb_config.pyl

@@ -665,7 +665,7 @@
     },
 
     'v8_dcheck_always_on': {
-      'gn_args': 'v8_dcheck_always_on=true',
+      'gn_args': 'v8_dcheck_always_on=true dcheck_always_on=true',
     },
 
     'debug': {
@@ -783,7 +783,7 @@
     },
 
     'release': {
-      'gn_args': 'is_debug=false',
+      'gn_args': 'is_debug=false dcheck_always_on=false',
     },
 
     'release_bot': {