There's a merged pull request on the void-packages repository

lvm2: include required symlinks in device-mapper pkg
https://github.com/void-linux/void-packages/pull/22898

Description:
Without these, monitoring raid1 LVs fails unless one installs `device-mapper-devel`. The log message is:
```
dmeventd libdevmapper-event-lvm2raid.so dlopen failed: libdevmapper-event-lvm2raid.so: cannot open shared object file: No such file or directory.
```

More details: the current `device-mapper` package includes:
```
/usr/lib/device-mapper/libdevmapper-event-lvm2mirror.so
/usr/lib/device-mapper/libdevmapper-event-lvm2raid.so
/usr/lib/device-mapper/libdevmapper-event-lvm2snapshot.so
/usr/lib/device-mapper/libdevmapper-event-lvm2thin.so
/usr/lib/device-mapper/libdevmapper-event-lvm2vdo.so
/usr/lib/libdevmapper-event-lvm2.so.2.02
/usr/lib/libdevmapper-event.so.1.02
/usr/lib/libdevmapper.so.1.02
/usr/lib/liblvm2cmd.so.2.02
```
while the current `device-mapper-devel` package includes:
```
/usr/lib/libdevmapper-event-lvm2.so -> /usr/lib/libdevmapper-event-lvm2.so.2.02
/usr/lib/libdevmapper-event-lvm2mirror.so -> /usr/lib/device-mapper/libdevmapper-event-lvm2mirror.so
/usr/lib/libdevmapper-event-lvm2raid.so -> /usr/lib/device-mapper/libdevmapper-event-lvm2raid.so
/usr/lib/libdevmapper-event-lvm2snapshot.so -> /usr/lib/device-mapper/libdevmapper-event-lvm2snapshot.so
/usr/lib/libdevmapper-event-lvm2thin.so -> /usr/lib/device-mapper/libdevmapper-event-lvm2thin.so
/usr/lib/libdevmapper-event-lvm2vdo.so -> /usr/lib/device-mapper/libdevmapper-event-lvm2vdo.so
/usr/lib/libdevmapper-event.so -> /usr/lib/libdevmapper-event.so.1.02
/usr/lib/libdevmapper.so -> /usr/lib/libdevmapper.so.1.02
/usr/lib/liblvm2cmd.so -> /usr/lib/liblvm2cmd.so.2.02
```

I claim all the symlinks for `libdevmapper-event-lvm2?*.so` should go into `device-mapper` pkg, which is what this PR does. Note the question mark, since I believe `libdevmapper-event-lvm2.so` should still go into `device-mapper-devel`.