We already have serde_with in the workspace and using it cuts down
on code lines (very slightly).
This also adds a FromStr implementation for HashAlgo in addition to
the existing TryFrom<&str>.
Change-Id: I1b525d7391f3881d54cef0c74d22198ad394f47d
Reviewed-on: https://cl.snix.dev/c/snix/+/30652
Reviewed-by: Florian Klink <flokli@flokli.de>
Tested-by: besadii
Autosubmit: Brian Olsen <brian@maven-group.org>
e5177ae930