chg: rewrite assprimeszerodim.lib based on modular.lib

(cherry picked from commit eeb2187019e8f379569be07360d245edfba0903a)
Signed-off-by: Andreas Steenpass <steenpass@mathematik.uni-kl.de>

Conflicts:
	Singular/LIB/assprimeszerodim.lib
chg: update tests for assprimeszerodim.lib

(cherry picked from commit d893866e31ec95b6789c03bc3635c2b9d4860554)
Signed-off-by: Andreas Steenpass <steenpass@mathematik.uni-kl.de>

Conflicts:
	Tst/Short/ok_s.lst

+ add assprimeszerodim_s.tst to Short.lst