[flang] [llvm] [mlir] [flang][OpenMP] Enable tiling (PR #143715)

[Jan Leyonberg via llvm-commits]

jsjodin wrote:

> > This is the next step that @Meinersbur is working on, but we wanted to make tiling available sooner.
> 
> Are you against a deadline for the tiling support? @Meinersbur's patch is already up for review and looked high quality to me. I don't think it is that far away from being approved. Maybe the tiling support should be based upon that patch.

Yes, there is a bit of a deadline, however @Meinersbur 's patch is close to being approved it is probably best to get that in first, and then rework this patch. 

https://github.com/llvm/llvm-project/pull/143715