[maglev] Add a --maglev clusterfuzz trial

.. and update old entries:

- Remove --no-untrusted-code-mitigations (flag no longer exists)
- Make --stress-concurrent-inlining-attach-code less likely since it
  mostly overlaps with --stress-concurrent-inlining and there haven't
  been many reports in this are lately.

Bug: v8:7700
Change-Id: Ic88ea74ca88a7c14edfc39bc0a55b846bb01e465
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3867506Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82882}

tools/clusterfuzz/trials/clusterfuzz_trials_config.json

@@ -6,6 +6,7 @@
     {"app_args": "--future", "app_name": "d8", "probability": 0.25},
     {"app_args": "--interrupt-budget=1000", "app_name": "d8", "probability": 0.25},
     {"app_args": "--jitless", "app_name": "d8", "probability": 0.1},
+    {"app_args": "--maglev", "app_name": "d8", "probability": 0.1, "contradicts": ["--jitless"]},
     {"app_args": "--random-gc-interval=2000", "app_name": "d8", "probability": 0.05},
     {"app_args": "--noanalyze-environment-liveness", "app_name": "d8", "probability": 0.1},
     {"app_args": "--no-enable-avx", "app_name": "d8", "probability": 0.1},
@@ -21,7 +22,6 @@
     {"app_args": "--no-enable-ssse3", "app_name": "d8", "probability": 0.1},
     {"app_args": "--no-lazy-feedback-allocation", "app_name": "d8", "probability": 0.35},
     {"app_args": "--no-regexp-tier-up", "app_name": "d8", "probability": 0.2},
-    {"app_args": "--no-untrusted-code-mitigations", "app_name": "d8", "probability": 0.1},
     {"app_args": "--no-use-ic", "app_name": "d8", "probability": 0.25},
     {"app_args": "--no-use-map-space", "app_name": "d8", "probability": 0.25},
     {"app_args": "--no-wasm-generic-wrapper", "app_name": "d8", "probability": 0.1},
@@ -29,7 +29,7 @@
     {"app_args": "--simulate-errors", "app_name": "d8", "probability": 0.001},
     {"app_args": "--stress-compaction-random", "app_name": "d8", "probability": 0.05},
     {"app_args": "--stress-concurrent-inlining", "app_name": "d8", "probability": 0.25, "contradicts": ["--assert-types"]},
-    {"app_args": "--stress-concurrent-inlining-attach-code", "app_name": "d8", "probability": 0.25, "contradicts": ["--assert-types"]},
+    {"app_args": "--stress-concurrent-inlining-attach-code", "app_name": "d8", "probability": 0.05, "contradicts": ["--assert-types"]},
     {"app_args": "--stress-flush-code", "app_name": "d8", "probability": 0.25},
     {"app_args": "--stress-marking=100", "app_name": "d8", "probability": 0.05},
     {"app_args": "--stress-scavenge=100", "app_name": "d8", "probability": 0.05},