feat(bss2): Support for "incremental experiments" and some cleanup of PyNN@0.12-related changes

We now support a builder pattern using pyNN.run(). This allows to construct single(!) experiments with changing stimulus dynamics/recording settings/parameter changes.

(Also: Some changes that were already available via 8.0-a2 have been cleaned up (i.e. passed internal review and CI).)

packages/hxtorch/package.py

@@ -21,6 +21,8 @@ class Hxtorch(WafPackage):
 
     maintainers = ['emuller']
 
+    version('8.0-a3',         tag='hxtorch-8.0-a3')
+    version('8.0-a2',         tag='hxtorch-8.0-a2')
     version('8.0-a1',         tag='hxtorch-8.0-a1')
     version('7.0-rc1-fixup3', tag='hxtorch-7.0-rc1-fixup3')
     version('7.0-rc1-fixup2', tag='hxtorch-7.0-rc1-fixup2')
@@ -28,6 +30,8 @@ class Hxtorch(WafPackage):
 
     # compiler for the BrainScaleS-2 embedded processor ("PPU"); needed for
     # building/linking, at runtime and for testing
+    depends_on('oppulance@8.0-a3', when='@8.0-a3', type=('build', 'link', 'run', 'test'))
+    depends_on('oppulance@8.0-a2', when='@8.0-a2', type=('build', 'link', 'run', 'test'))
     depends_on('oppulance@8.0-a1', when='@8.0-a1', type=('build', 'link', 'run', 'test'))
     depends_on('oppulance@7.0-rc1-fixup3', when='@7.0-rc1-fixup3', type=('build', 'link', 'run', 'test'))
     depends_on('oppulance@7.0-rc1-fixup2', when='@7.0-rc1-fixup2', type=('build', 'link', 'run', 'test'))