Rename cudax test targets to match CCCL conventions.

[alliepiper]

..test.
instead of
.._tests

[github-actions]

🟩 CI finished in 12m 57s: Pass: 100%/52 | Total: 2h 23m | Avg: 2m 45s | Max: 11m 26s | Hits: 91%/216

• 🟩 cudax: Pass: 100%/52 | Total: 2h 23m | Avg: 2m 45s | Max: 11m 26s | Hits: 91%/216

  🟩 cpu
    🟩 amd64              Pass: 100%/48  | Total:  2h 15m | Avg:  2m 49s | Max: 11m 26s | Hits:  91%/216   
    🟩 arm64              Pass: 100%/4   | Total:  7m 11s | Avg:  1m 47s | Max:  1m 55s
  🟩 ctk
    🟩 12.0               Pass: 100%/19  | Total: 54m 03s | Avg:  2m 50s | Max: 10m 34s | Hits:  91%/108   
    🟩 12.6               Pass: 100%/33  | Total:  1h 29m | Avg:  2m 42s | Max: 11m 26s | Hits:  91%/108   
  🟩 cudacxx
    🟩 nvcc12.0           Pass: 100%/19  | Total: 54m 03s | Avg:  2m 50s | Max: 10m 34s | Hits:  91%/108   
    🟩 nvcc12.6           Pass: 100%/33  | Total:  1h 29m | Avg:  2m 42s | Max: 11m 26s | Hits:  91%/108   
  🟩 cudacxx_family
    🟩 nvcc               Pass: 100%/52  | Total:  2h 23m | Avg:  2m 45s | Max: 11m 26s | Hits:  91%/216   
  🟩 cxx
    🟩 Clang9             Pass: 100%/2   | Total:  5m 07s | Avg:  2m 33s | Max:  2m 38s
    🟩 Clang10            Pass: 100%/2   | Total:  4m 41s | Avg:  2m 20s | Max:  2m 21s
    🟩 Clang11            Pass: 100%/4   | Total:  8m 58s | Avg:  2m 14s | Max:  2m 21s
    🟩 Clang12            Pass: 100%/4   | Total:  9m 03s | Avg:  2m 15s | Max:  2m 21s
    🟩 Clang13            Pass: 100%/4   | Total:  9m 06s | Avg:  2m 16s | Max:  2m 21s
    🟩 Clang14            Pass: 100%/4   | Total: 10m 41s | Avg:  2m 40s | Max:  3m 36s
    🟩 Clang15            Pass: 100%/2   | Total:  4m 49s | Avg:  2m 24s | Max:  2m 26s
    🟩 Clang16            Pass: 100%/4   | Total:  9m 05s | Avg:  2m 16s | Max:  2m 52s
    🟩 Clang17            Pass: 100%/2   | Total:  4m 52s | Avg:  2m 26s | Max:  2m 27s
    🟩 Clang18            Pass: 100%/2   | Total:  6m 34s | Avg:  3m 17s | Max:  4m 13s
    🟩 GCC9               Pass: 100%/2   | Total:  4m 24s | Avg:  2m 12s | Max:  2m 15s
    🟩 GCC10              Pass: 100%/4   | Total:  8m 29s | Avg:  2m 07s | Max:  2m 13s
    🟩 GCC11              Pass: 100%/4   | Total:  8m 22s | Avg:  2m 05s | Max:  2m 09s
    🟩 GCC12              Pass: 100%/7   | Total: 21m 36s | Avg:  3m 05s | Max:  4m 28s
    🟩 GCC13              Pass: 100%/3   | Total:  5m 22s | Avg:  1m 47s | Max:  2m 00s
    🟩 MSVC14.36          Pass: 100%/1   | Total: 10m 34s | Avg: 10m 34s | Max: 10m 34s | Hits:  91%/108   
    🟩 MSVC14.39          Pass: 100%/1   | Total: 11m 26s | Avg: 11m 26s | Max: 11m 26s | Hits:  91%/108   
  🟩 cxx_family
    🟩 Clang              Pass: 100%/30  | Total:  1h 12m | Avg:  2m 25s | Max:  4m 13s
    🟩 GCC                Pass: 100%/20  | Total: 48m 13s | Avg:  2m 24s | Max:  4m 28s
    🟩 MSVC               Pass: 100%/2   | Total: 22m 00s | Avg: 11m 00s | Max: 11m 26s | Hits:  91%/216   
  🟩 gpu
    🟩 v100               Pass: 100%/52  | Total:  2h 23m | Avg:  2m 45s | Max: 11m 26s | Hits:  91%/216   
  🟩 jobs
    🟩 Build              Pass: 100%/47  | Total:  2h 03m | Avg:  2m 37s | Max: 11m 26s | Hits:  91%/216   
    🟩 Test               Pass: 100%/5   | Total: 20m 05s | Avg:  4m 01s | Max:  4m 28s
  🟩 sm
    🟩 90                 Pass: 100%/1   | Total:  2m 05s | Avg:  2m 05s | Max:  2m 05s
    🟩 90a                Pass: 100%/1   | Total:  2m 00s | Avg:  2m 00s | Max:  2m 00s
  🟩 std
    🟩 17                 Pass: 100%/28  | Total:  1h 06m | Avg:  2m 22s | Max:  3m 57s
    🟩 20                 Pass: 100%/24  | Total:  1h 16m | Avg:  3m 12s | Max: 11m 26s | Hits:  91%/216   
  

👃 Inspect Changes

Modifications in project?

	Project
	CCCL Infrastructure
	libcu++
	CUB
	Thrust
+/-	CUDA Experimental
	pycuda
	CCCL C Parallel Library

Modifications in project or dependencies?

	Project
	CCCL Infrastructure
	libcu++
	CUB
	Thrust
+/-	CUDA Experimental
	pycuda
	CCCL C Parallel Library

🏃‍ Runner counts (total jobs: 52)

#	Runner
41	linux-amd64-cpu16
5	linux-amd64-gpu-v100-latest-1
4	linux-arm64-cpu16
2	windows-amd64-cpu16