configure.py: add SCYLLA-RELEASE-FILE/SCYLLA-VERSION-FILE targets
configure.py: add SCYLLA-RELEASE-FILE/SCYLLA-VERSION-FILE targets

To re-generate scylla version files when it removed, since these files
required for relocatable package.

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

scylladb/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla