These tests were marked as NO_VARIANTS under debug, but they were timing
out under turbofan_opt as well on the CFI bot (see, e.g.:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20cfi/builds/6765).

R=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2400463003
Cr-Commit-Position: refs/heads/master@{#40103}