Fix a failing mjsunit test with lazy feedback allocation

Bug: v8:8394
Change-Id: I02551ff3d51e914f5a24f221186f23a8e3d2cc77
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1648096Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62026}

test/mjsunit/regress/regress-undefined-nan.js

@@ -18,6 +18,7 @@ var fixed_double_elements = new Float64Array(1);
 
 function opt_store() { fixed_double_elements[0] = f_view[0]; }
 
+%PrepareFunctionForOptimization(opt_store);
 opt_store();
 opt_store();
 %OptimizeFunctionOnNextCall(opt_store);
@@ -28,6 +29,7 @@ assertEquals(i_view[0], i32[0]);
 assertEquals(i_view[1], i32[1]);
 
 var doubles = [0.5];
+%PrepareFunctionForOptimization(loader);
 loader(doubles, fixed_double_elements, 0);
 loader(doubles, fixed_double_elements, 0);
 %OptimizeFunctionOnNextCall(loader);