shifted GLOBAL_ROUTE_ARGS definition to allow override

[jeffng-or]

No description provided.

[oharboe]

No suggestions as such, just some comments.

Perhaps time to bump ORFS? There has been some OpenROAD improvements in macros(check that OR is upgraded in ORFS recently before upgrading and bump OR in ORFS if not).

megaboom is there to run experiments using the CI and whatever we need to do to run todays experiments is fine to merge. Worst case we have the git history.

Also, I think it is fine to have some experiments only in PRs that are never merged as the code is just todays experiment and there is no reuse value as such.

GLOBAL_ROUTE_ARGS did not have "stages:" in variables.yaml at the time, so I had to add this to stage_arguments.

Note that you can easily support stage_arguments in SWEEP, though in the case of GLOBAL_ROUTE_ARGS it is moot.

[oharboe]

With latest changes on main, I think this PR is moot. Close?