```
Migrate package definitions to use the new format for propogated inputs.
See
https://guix.gnu.org/manual/en/html_node/package-Reference.html#index-inputs_002c-of-packages.
See also: https://guix.gnu.org/blog/2021/the-big-change/
```
Backport of [[https://github.com/bitcoin/bitcoin/pull/28965 | core#28965]].
Depends on D17245.