update fairgraph to 0.11.1

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!400

feat(BSS2): add/reenable tests

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!396

feat(BSS-2): update software

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!397

We previously had those install tests disabled due to segfaults happening at
teardown time (log4cxx double free or similar issues).

The deps shouldn't default to ("build", "link") as this is a workflow package
that shall provide a) a "realistic" test environment and b) a bundled set of
dependencies for typical use cases (at runtime).

This is probably needed for test execution in workflow packages.

use notebook as test for multi-area-model workflow package

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!395

Add Arbor v0.9.0

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!393

Add py-tvb-multiscale

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!371

Fixed site-config paths for JSC systems.

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!392

Add java spinnaker

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!390