Revert "[GWP-ASan] Fix test to work with Fuchsia's zxtest"

This reverts commit 64138725e4cf0ab5e3f9c0dba38e11ce3d3b4017.

Parent change https://reviews.llvm.org/D140173 broke an internal build.
I'll land this bit as part of the re-land for
https://reviews.llvm.org/D140173.

GitOrigin-RevId: d99120939ecbe686d418fc29fdac9bc6574b5f30
1 file changed