This test somehow ended up inside an assertThrows arrow function, after
the expression that was supposed to throw -- so it never got executed
(and the expectation was slightly off.) This moves the test outside the
arrow function so it gets executed, and fixes the expectation.

Justification for changing the expectation: rab is [0, 1, 2, 3, ... 9],
and length_tracking_ta_with_offset2 has an offset of 2, so it is [2, 3,
...]. During the loop, after 2 iterations which have produced [2, 3], we
resize the buffer so the array has length 0. Therefore, the iteration
ends after producing [2, 3], not [3, 4].

Change-Id: Iec6024fb955102841b45f033de3fed80b7d2af34
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3878244Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Auto-Submit: Philip Chimento <ptomato@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83009}