[tests] Add --stress-lazy-source-positions to stress variant

Bug: v8:8510
Change-Id: Ie2b1cbbc136fecf3a81716b129e51857bd8db157
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1762294Reviewed-by: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63310}

test/cctest/test-serialize.cc

@@ -1518,6 +1518,7 @@ static Handle<SharedFunctionInfo> CompileScriptAndProduceCache(
 
 TEST(CodeSerializerWithProfiler) {
   FLAG_enable_lazy_source_positions = true;
+  FLAG_stress_lazy_source_positions = false;
 
   LocalContext context;
   Isolate* isolate = CcTest::i_isolate();

tools/testrunner/local/variants.py

@@ -23,7 +23,7 @@ ALL_VARIANT_FLAGS = {
   "nooptimization": [["--no-opt", "--liftoff", "--no-wasm-tier-up"]],
   "slow_path": [["--force-slow-path"]],
   "stress": [["--stress-opt", "--always-opt", "--no-liftoff",
-              "--no-wasm-tier-up"]],
+              "--no-wasm-tier-up", '--stress-lazy-source-positions']],
   "stress_js_bg_compile_wasm_code_gc": [["--stress-background-compile",
                                          "--wasm-code-gc",
                                          "--stress-wasm-code-gc"]],