[clang] [flang] [llvm] [openmp] [Flang][OpenMP] Move builtin .mod generation into runtimes (PR #137828)

[Michael Kruse via cfe-commits]

Meinersbur wrote:

@kkwli 
The error is in the workaround code for #139297. Should go away afer I rebase to #143699.


https://github.com/llvm/llvm-project/pull/137828