Please finish transition from python3-glue to python3-lscsoft-glue

There's an eternal conflict of this glue's python3 package with one provided by Debian proper, causing strange build errors in the middle of LALsuite.

Since lscsoft-glue build-depends on lal and e.g. lalburst depends on python3-glue this causes unnecessary interruptions: Debian's python3-glue package is at version 1.0-1 or so but nevertheless gets included by Depends: not specifying version range.

python3-glue (this one) has for long been a transitional package only. Please get rid of it, and force LALsuite developers to use the right dependency.