bootupd: Use --write-uuid

This is an even newer behavior that takes over handling
of the "UUID stamp files", which we want in general instead of
using the static labels.

Note `--write-uuid` implies `--with-static-configs`.

This should fix this use case:

```
clearpart --all --initlabel --disklabel=gpt
reqpart --add-boot
part / --grow --fstype xfs
```

Whereas right now we require:

```
clearpart --all --initlabel --disklabel=gpt
reqpart
part /boot --size=1000  --fstype=ext4 --label=boot
part / --grow --fstype xfs
```

Specifically the `--label=boot`.

pyanaconda/modules/payloads/payload/rpm_ostree/installation.py

@@ -515,7 +515,7 @@ def _install_bootupd(self):
                 "backend",
                 "install",
                 "--auto",
-                "--with-static-configs",
+                "--write-uuid",
                 "--device",
                 dev_data.path,
                 "/",