[v8] Enable fuzzing of Turbofan's instruction scheduling

While this feature is disabled by default, it is a non-experimental
feature and other fuzzers already create exposure of this feature
(see
https://source.chromium.org/chromium/chromium/src/+/main:v8/tools/clusterfuzz/trials/clusterfuzz_trials_config.json;l=60;drc=84a1682b877e88c8912cebf44a8513c7d84206ed)

Bug: 485657212
Change-Id: I899357c64d4e2dfd9385d3da5f445f0edc447765
Reviewed-on: https://chrome-internal-review.googlesource.com/c/v8/fuzzilli/+/9035976
Reviewed-by: Darius Mercadier <dmercadier@google.com>
Auto-Submit: Matthias Liedtke <mliedtke@google.com>
Commit-Queue: Matthias Liedtke <mliedtke@google.com>

Author: Liedtke

Sources/FuzzilliCli/Profiles/V8CommonProfile.swift

@@ -795,6 +795,10 @@ public func v8ProcessArgs(randomize: Bool, forSandbox: Bool) -> [String] {
         if probability(0.5) {
             args.append("--maglev-as-top-tier")
         }
+    } else if probability(0.1) {
+        args.append(probability(0.5)
+            ? "--turbo-instruction-scheduling"
+            : "--turbo-stress-instruction-scheduling")
     }
 
     if probability(0.1) {