[compiler-rt][fuzzer][test] Disable finalstats test
This test is flaky and has been reporting irrelevant failures to PRs
on Github for example:
https://github.com/llvm/llvm-project/pull/97829#issuecomment-2214030135
https://lab.llvm.org/buildbot/#/builders/66/builds/1159
Adding this to https://github.com/llvm/llvm-project/issues/97712.
