Kubernetes Runtime

[Piszmog]

Closes #46214.

Changes

• Added Kubernetes Command
  • Added a specific K8s implementation of command.Command to read logs
  • Added function to build K8s Jobs
• Added Kubernetes Runner
  • Be able to interact with K8s APIs to run Jobs
  • Jobs are also torn down at the end
• Added a Kubernetes Runtime
  • Create workspaces
    • At the moment, a persistent volume is attached to the service. This may change in the future
  • Create a runner
  • Build run specs
• Updated Executor K8s docs to reference the new runtime capability
• Added a specific Executor K8s image that does not contain src or docker
  • Update the build pipeline to build this new image

Test plan

Add tests, updated docs and ran locally.