[clang] [flang] [flang] Support -f(no-)protect-parens (PR #170505)

[Kiran Chandramohan via cfe-commits]

kiranchandramohan wrote:

Would it have been better to include `-fno-protect-parens` with `-ffast-math` in Flang? `Ofast` is deprecated and might be removed sometime in the future.

https://github.com/llvm/llvm-project/pull/170505