testing/pypy: upgrade to 7.3.5, drop python2 depend
This bumps pypy to 7.3.5 and uses pypy instead of python2 #12740 (closed) for building. See also !26176 (merged) for the bootstrapping package.
Edited by Thomas Liske
This bumps pypy to 7.3.5 and uses pypy instead of python2 #12740 (closed) for building. See also !26176 (merged) for the bootstrapping package.