test(e2e): add provider test cases

[ghost]

This PR adds smoke test cases for the devpod provider subcommand

[linear]

ENG-1107 DevPod E2E Tests

Create a couple of e2e tests that make sure DevPod works correctly with the Local Provider.

We need:

• Github Action that runs the e2e tests on PR (similar to how we do it in vcluster, devspace etc.)

• Github Action that runs the existing unit tests on PR (similar to how we do it in vcluster, devspace etc.)

• Boilerplate code for e2e tests, I would suggest we use ginkgo as we do in our other projects

• Couple of e2e tests that test the following:

• Create/delete/stop/start workspace via devpod up (use provider local)

• Check ssh is working via devpod ssh --comand

• Check adding/updating/deleting a provider works via devpod provider add examples/simple-k8s-provider

Approach: ~4-6 hours

• Copy structure from DevSpace ~1 hour
• Test DevPod yourself locally, run devpod up & devpod ssh (Done)
• Invoke the commands in the e2e test: ~1-2 hours
  • User input is out of scope (e2e tests should work with flags and never try to answer any user questions)
  • Before devpod up , you need to run devpod use provider local
• Test the e2e tests locally ~1-2 hours
• Test the pipeline remotely ~1-2 hours

[FabianKramm]

@kristoffn thanks for the PR! Please take a look at my comments

[FabianKramm]

Can we ensure here that the provider was actually updated?

[ghost]

Addressed in https://github.com/kristoffn/devpod/compare/282ccd4a4ff2d8c6ecb05808355cc38569891f43..b21c3c54c427bb874bafc6c20ba6de9a7b516e13

[FabianKramm]

Can we ensure here that the provider was actually deleted?

[ghost]

Addressed in: https://github.com/kristoffn/devpod/compare/e1b9376d85562747b9b20d0539c4a179ff165f0b..282ccd4a4ff2d8c6ecb05808355cc38569891f43