Exit after printing v8 help
V8 does not exit the process after handling --help anymore: https://chromium-review.googlesource.com/c/v8/v8/+/2276276
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines