[llvm] [llvm] Consistently respect `naked` fn attribute in `TargetFrameLowering::hasFP()` (PR #106014)

[Alexander Richardson via llvm-commits]

arichardson wrote:

It's not ideal having to duplicate this across all targets. Could we do something like moving this check into a non-virtual function in the base class and then dispatching to the target-specific function (I guess we could call it hasFPImpl or something like that)?

https://github.com/llvm/llvm-project/pull/106014