skip some elephant tests that fail on HPC

Closes #38 and #43

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!334

apbs fix: make sure apbs find blas libs

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!333

BrainScaleS: Update software state

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!331

We introduce `5.0-rc1` which is `4.0-rc2` + a few backported build
changes that enables building on non-x86 architectures.
This update introduces compile-time switches to disable building parts
of the low-level software stack which can be skipped for EBRAINS
operation; in particular, the communication modes for non-quiggeldy (the
experiment service) communication with the neuromorphic system are
now disabled conditionally.

create new experimental release

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!330

Update tvb-* packages

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!326

Update PyNN

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!327

* commit 'a645d552':
  new pynn version

update Neo dependencies

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!324

Add PyNN 0.11.0

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!325

add neuron tests

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!323

fix sda package

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!322

use Spack v0.19.2

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!320

build(*BrainScaleS): disable doxygen docu build

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!321

switch from preferences to requirements for python,R version (https://github.com/spack/spack/pull/27987)