Process replay: move refs to ci-artifacts

[elkoled]

Description
This PR moves the process replay ref storage from azure blob storage to commaai/ci-artifacts.
Re-enables CI ref generation, ref_commit file is not needed anymore.

Verification
Process replay CI passes with diff output

Changes

• Removes ref_commit file, uses ci-artifacts to save refs and ref_commit
• Updates master refs on every master push
• Keeps ref_commit file logic for bw compatibility in forks
• Cache key based on test_processes.py, since source segment URLs are stable and refs now update every master push
• rm AZURE_TOKEN and PYTHONWARNINGS workaround for Azure SDK warnings

[elkoled]

@sshane ready for review

[adeebshihadeh]

Are we able to remove the azure deps from pyproject.toml now too?

[elkoled]

The only usage left is manual upload of new ci routes in update_ci_routes.py
When we move these to use comma_car_segments, the azure deps and 3 helper scripts can be deleted.