Bug#943135: numba: Python2 removal in sid/bullseye - reopen 943135

[Sandro Tosi]

Control: reopen -1

This bug was closed, but the package has still some dependencies towards
Python2 packages, in details:

(source:numba)Testsuite-Triggers->python-all-dev
(source:numba)Testsuite-Triggers->python-funcsigs
(source:numba)Testsuite-Triggers->python-numba
(source:numba)Testsuite-Triggers->python-singledispatch
(binary:numba-doc)Recommends->python-numba

Re-opening, so that they can be taken care of.