[llvm] [test] Disable makeAllowedFCmpRegion due to taking too long (PR #111056)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

I have sped up the test run from 30.22s -> 10.59s by ignoring the payload in NaN values. Is it acceptable?


https://github.com/llvm/llvm-project/pull/111056