Add new fuzzing flags for V8

This change introduces the following flags to the V8 fuzzing profile:

- --maglev-as-top-tier
- --maglev-non-eager-inlining
- --max_maglev_inlined_bytecode_size_small=0
- --max_inlined_bytecode_size_small=0

These flags are expected to increase fuzzing coverage for edge cases in the V8 engine.

While the probabilities in the code may seem high, they are conditional and depend on other flags being set.

Bug: 456452258, 456451490, 456142887, 455592879
Change-Id: I486170bc27798f31ee905f2ff8e6c881a44b9265
Reviewed-on: https://chrome-internal-review.googlesource.com/c/v8/fuzzilli/+/8736336
Commit-Queue: Dominik Klemba <tacet@google.com>
Reviewed-by: Matthias Liedtke <mliedtke@google.com>
Auto-Submit: Dominik Klemba <tacet@google.com>
Reviewed-by: Victor Gomes <victorgomes@google.com>
Reviewed-by: Darius Mercadier <dmercadier@google.com>

Author: Dominik Klemba

Sources/FuzzilliCli/Profiles/V8Profile.swift

@@ -41,6 +41,9 @@ let v8Profile = Profile(
         //
         if probability(0.1) {
             args.append("--no-turbofan")
+            if probability(0.5) {
+                args.append("--maglev-as-top-tier")
+            }
         }
 
         if probability(0.1) {
@@ -91,6 +94,13 @@ let v8Profile = Profile(
             args.append("--maglev-future")
         }
 
+        if probability(0.2) && !args.contains("--no-maglev") {
+            args.append("--maglev-non-eager-inlining")
+            if probability(0.4) { // TODO: @tacet decrease this probability to max 0.2
+                args.append("--max_maglev_inlined_bytecode_size_small=0")
+            }
+        }
+
         if probability(0.1) {
             args.append("--turboshaft-typed-optimizations")
         }
@@ -99,6 +109,9 @@ let v8Profile = Profile(
             args.append("--turbolev")
             if probability(0.82) {
                 args.append("--turbolev-future")
+                if probability(0.3) { // TODO: @tacet change to 0.15
+                    args.append("--max_inlined_bytecode_size_small=0")
+                }
             }
         }