Package sisyphus_check: Information

Cherry-picked (to make more "permissive" w.r.t. disttag in 210-check-kernel):
[0.8.47-alt1]
- 090-check-nvr: check disttag.
- 210-check-kernel (check_kmodule): strip disttag from kernel_release.
[0.8.46-alt1]
- 090-check-nvr: make version and release check more strict

- check-python: minor version is not allowed in
  /usr/lib(64)?/python3[.][0-9]/site-packages/.
- check-python: adapted to the possibility of having modules in
  /usr/lib(64)?/python[23]/ without the minor version.

- 220-check-python: disallow having files in tools/ and lib-dynload/
  subdirs of %python_libdir (for all except pythonN.src.rpm's
  subpkgs).