[sanitizer][fuchsia] Fix fuchsia buildbot failure after...

[sanitizer][fuchsia] Fix fuchsia buildbot failure after 64790064 (#82202)

In https://github.com/llvm/llvm-project/pull/77488, a param `raw_report`
is added for function `UnmapOrDie()`.
But missing the corresponding change for fuchsia, causes the buildbot
failure, see https://lab.llvm.org/buildbot/#/builders/98/builds/33593.
This patch should fix the fuchsia buildbot failure.