[EPIC] GitHub Actions CI

[jrhemstad]

devcontainers

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1. Migrate cccl_devcontainers matrix to rapidsai/devcontainers #72
   2 of 2
   +0
   
2. Initial devcontainer features #76
   2 of 2
   +0
   
3. Additional devcontainer features #77
   1 of 2
   +0
   

Action workflows

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1. Setup Initial Actions Workflow Matrix #22
   7 of 7
   +0
   
2. Enable full matrix to complete successfully #102
   7 of 7
   +0
   
3. [FEA]: Add CI job for testing libcudacxx with NVRTC #141
   2 of 4
   infrastructure libcu++ +2
   
4. [FEA]: Add ICC as a host compiler to CI #140
   infrastructure +1
   
5. [FEA]: Add NVHPC as a host compiler to CI #139
   infrastructure +1
   
6. [FEA]: Add host-only TU testing for libcudacxx #192
   infrastructure libcu++ +2
   
7. Set up branch protection to prevent merging without CI passing #193
   +0

Future Work

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1. Setup Windows build workflows on GitHub hosted Windows runners #69
   3 of 3
   infrastructure +1
   
2. [EPIC] Setup Windows container and script infrastructure #248
   5 of 8
   +0
3. [FEA]: Expand matrix.yaml definition to add support for additional kinds of jobs #239
   2 of 4
   +0
   
4. Add ARM build jobs #467
   +0