Draft: Upgrade TVB packages. Add unit-tests
requested to merge ldomide/ebrains-spack-builds:test-spacktests-workaround into test-spacktests-workaround
Upgrade tvb-data, tvb-library, tvb-framework, tvb-storage packages.
Add unit-tests with pytest where possible.
Add tvb-gdist module.
Adjust package names py-tvb-*