Use longer tarball link again, as upstream may have branches of the same name as the tag.
Move python-systemd to optdepends (it is only optionally required for systemd-journald support).

Remove unneeded makedepends.
Add python-systemd to depends (for journal output).
Remove unneeded conflicts/replaces.
Use bash arrays with one entry per line for better handling.

Use the pre-release of archinstall to hopefully fix https://github.com/archlinux/archinstall/issues/1557

Switch to python-flit-core in makedepends, as that provides the PEP517 backend we need.
Add systemd to depends as we are relying on systemd.

archlinux/devtools!109 (comment 74475)

Remove unneeded quotes and curly braces.
Switch to PEP517 (by replacing symlinks with real directories).