Add hxtorch@2.0-rc8 to environment

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!127

This reverts commit f64d31a2.

This reverts commit ee0222a0

Add hxtorch@2.0-rc8 to environment

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!126

This reverts commit 1afda157.

This reverts commit 8eff863e

Fix and re-add hxtorch@2.0-rc8 to environment

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!125

This reverts commit 50458553.

This reverts commit 815efc9b

Maybe fix hxtorch build

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!124

This adds googletest's lib/lib64 isntall folder explicitly to the list
of libraries (it should have been found… but wasn't).

This reverts commit 1316ac12

Update BrainScaleS software to 2.0-rc7

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!123

snudda dependency fix

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!118

fix snudda url

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!117

(fix) Add snudda dependencies from BlueBrainProject repo and activate

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!116

This reverts merge request !115

Add snudda dependencies from BlueBrainProject repo and activate

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!115

Update PyNN to 0.10.0

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!114