[flang-commits] [flang] [Flang] Move non-Common headers to FortranSupport (PR #124416)

[via flang-commits]

jeanPerier wrote:

Following up on [PR122069 comments](https://github.com/llvm/llvm-project/pull/122069#issuecomment-2613162671), We are OK going in your direction if that make things easier for you on the condition that the container like headers remain together to make the life of the developers easier (these are header only tools that could be use in the runtime too with small adjustments if needed, and having them separated from the other similar header makes them harder to find).

That is, please keep the following headers in Common even though they are not used in the runtime currently: 

```
indirection.h
interval.h
reference-counted.h
reference.h
static-multimap-view.h
template.h
unwrap.h
``` 

https://github.com/llvm/llvm-project/pull/124416