[foozzie] Add "trusted" correctness fuzzing variants

NOTRY=true

Bug: chromium:798982
Change-Id: I0aa2bee5bf33884fa9bfc15da3053d817e1a1b49
Reviewed-on: https://chromium-review.googlesource.com/852212Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50381}

tools/foozzie/v8_foozzie.py

@@ -55,6 +55,15 @@ CONFIGS = dict(
     '--no-lazy-inner-functions',
     '--suppress-asm-messages',
   ],
+  trusted=[
+    '--no-untrusted-code-mitigations',
+    '--suppress-asm-messages',
+  ],
+  trusted_opt=[
+    '--always-opt',
+    '--no-untrusted-code-mitigations',
+    '--suppress-asm-messages',
+  ],
 )
 
 # Timeout in seconds for one d8 run.