CUB tests need improved compiler coverage

[alliepiper]

Milestone Target Summary

We currently do not test on all platforms that we support. We should test each supported major version of GCC, Clang, and MSVC. Thrust has decent coverage since DVS builds the Thrust tests and examples, but DVS does not know about CUB. We currently know that the CUB test harness cannot be built on GCC 5, see error below.

Deliverables

• Manually validate Thrust/CUB and enable Thrust's gpuCI for the latest releases of:
  • GCC
    • 5
    • 6
    • 7
    • 8
    • 9
    • 10
  • Clang
    • 6 (will deprecate)
    • 7
    • 8
    • 9
    • 10
  • MSVC:
    • 2017 (will deprecate)
    • 2019
• Fix all compile and runtime issues identified by these tests.
• Add DVS coverage for CUB tests (Teach DVS to run our gpuCI containers?)
• Add gpuCI coverage for MSVC.

[alliepiper]

Completed the planned work for 1.12.0.

Still need windows coverage on gpuCI.

[alliepiper]

All that's really left is windows and internal testing against ToT nvcc. We're internally exploring a few different routes to make this happen.