RFC: support udev-hid-bpf add without any device argument

Since our BPFs define which devices they apply to it'd be nice if we could support this particular use-case:

udev-hid-bpf add --replace builddir/src/bpf/0010-Foo__Bar.bpf.o

At which point we grab the matching devices from the bpf object and try to attach to any local devices that match. This makes it much easier to use than the current requirement to specify the full syspath - especially since the latter contains the incrementing field that changes whenever the rdesc is replaced.