Part 1 of two changes I've been carting around since the hackathon.
This PR moves the /cli/config package into /pkg/config. This allows
sdk consumers to access corso configuration handling, intead of
requiring the CLI package to access it.
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🤖 Supportability/Tests
#### Test Plan
- [x] 💪 Manual
- [x] ⚡ Unit test
- [x] 💚 E2E