[CI] Move setup to dedicated pacxx-ci project

See merge request !35

Addresses: pacxx-runtime#28

[CI] Stop supporting `native-` test labels

See merge request !34

These have been superceded by `rv-` and `norv-` labels.

Addresses: https://gitlab.dune-project.org/joe/pacxx-docker/issues/26

Copied from pacxx-runtime!41

Document issue numbers for known failures.

Closes #13 and #14

See merge request !33

Closes: #13, #14

[test][native] Reevalutate test labels

See merge request !32

Remove the native- test labels, and replace then by rv- or norv- as
appropriate.

[CI] Explicitly expire artifacts in one week.

See merge request !31

Addresses: pacxx-runtime#25

Copied from: pacxx-runtime!40

[CI] Do native tests with and without rv

See merge request !30

Addresses: https://gitlab.dune-project.org/joe/pacxx-docker/issues/26

Also, split test stage into building samples and actual testing.

This should be converted to using the `extends:` feature once we have GitLab
11.3

This is in preparation for testing with and without rv, see
https://gitlab.dune-project.org/joe/pacxx-docker/issues/26

[CI] Make pacxx-runtime the authoritative place for ci-main.yml

See merge request !29

See https://gitlab.dune-project.org/joe/pacxx-docker/issues/30

Copied from pacxx-runtime!38

[CI] Stop triggering pacxx-docker rebuilds, they'll be done nightly.

See merge request !28

See: https://gitlab.dune-project.org/joe/pacxx-docker/issues/27

Copied from
pacxx-llvm2!8

[CI] Use common CI setup.

See merge request !27

See: https://gitlab.dune-project.org/joe/pacxx-docker/merge_requests/65

Adresses: https://gitlab.dune-project.org/joe/pacxx-docker/issues/21

Disable gauss test since it does not compile.

See merge request !26

See #11

See #10

[CI] test with cuda

Closes #9

See merge request !25

[CI] Use consistent runner tags

See merge request !24

Adresses: #8