[clang] [Driver] Remove ignored Flag form of -fauto-profile/-fprofile-sample-use (PR #113528)

[Mikołaj Piróg via cfe-commits]

mikolaj-pirog wrote:

Regarding the default filename extension, it doesn't have to be `.profdata` for `fprofile-sample-use`, it can be the `.afdo`, or any other extension deemed proper.  `fprofile-sample-use` and `fprofile-use` would behave similarly then: they would look for a `default` file with appropriate extension, which seems like a reasonable behavior to me

https://github.com/llvm/llvm-project/pull/113528