Merge topic 'gitlab-ci-ext-test-sets'

2e7cefec03 gitlab-ci: add a cuda10.2 builder
1a2961b895 Tests: add CUDA labels to tests which are affected by CUDA
2caa7502d5 ci: support running just a set of tests with external builders
26b4cbcf93 gitlab-ci: move Makefiles Linux tests to use the package

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4877