[clang] [flang] [Flang][Driver] Introduce -fopenmp-targets offloading option (PR #100152)

[Anastasia Stulova via cfe-commits]

AnastasiaStulova wrote:

Can you please provide more details about the design of the interface for setting the offload targets? Is the idea here to mirror clang's interface? While clang has a uniform design for [the main target triple](https://clang.llvm.org/docs/CrossCompilation.html#target-triple) it doesn't really have such uniformity for the offload. Since flang is being newly developed it maybe useful to think whether the interface can be made more uniform. Are there any other language modes or targets that require such setting for offload? How would it look like from the user's perspective as a big picture to select the offload target for the programming models supported by flang?

https://github.com/llvm/llvm-project/pull/100152