Use GitHub hosted Ubuntu arm64 runners instead of CircleCI

[manics]

https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/

This is on top of #3604

Currently there are some bugs in the runner image:

• XDG_CONFIG_HOME points to /home/runneradmin/.config, not /home/runner/.config actions/partner-runner-images#27
• /home/runner/.local/bin missing from PATH actions/partner-runner-images#25

This results in helm attempting to create a config file n a location it doesn't have access to. We could fix the environment variable XDG_CONFIG_HOME, but let's see if it's fixed upstream.

If we want to merge this we'll need to disable the CircleCI check which is now failing since I've deleted .circleci/config.yml

[consideRatio]

Oooooh nice fix transitioning from ancient minica image -> openssl image!!

certificate is valid for localhost, pebblepebble.defaultpebble.default.svcpebble.default.svc.cluster.local, not pebble" 

Seems like pebble and pebble.default etc was merged into a single string unintentionally.

[manics]

Done in jupyterhub/pebble-helm-chart@aa6fc2b

[consideRatio]

GitHub pages cache seems to serve the latest stuff already, we should be good to go here without using your fork again!

helm show chart --repo=https://hub.jupyter.org/helm-chart/ pebble | yq e '.version' -
1.3.0

[consideRatio]

Going to bed, but this looks great assuming tests pass after going back to using the pebble 1.3.0 version with you fix!

[manics]

Green!