snapshotEngine: DigitalOcean complete migration

[orcutt989]

This completes the migration of the snapshotEngine to work with DigitalOcean.

Changes

• Converted busy waits to waits that sleep 1 minute. This resulted in a 30x-60x reduction in CPU time for idling pods. 60% of a core to 1%-2% of a core for idle pods.
• DigitalOcean has a snapshot timeout of 10 minutes so the Snapshot Warmer has been reduced to only creating a snapshot and then waiting for 10 minutes. It maintains 5 snapshots still, but it does not delete "stuck" snapshots anymore.
• For some reason localhost does not work from the Tezos container when trying to reach the RPC so this was changed to 127.0.0.1.
• Both AWS and DigitalOcean credentials are stored as Kubernetes secrets.
• Storage Class has been changed from AWS' ebs-sc to DigitalOceans' do-block-storage.
• Snapshot Maker pod no longer waits for a node to be ready as this logic was moved to both the Snapshot Scheduler pod and the Snapshot Warmer pods. Before snapshots could be taken if a node was not synced, now that is not possible.
• Sleeps were added to creation and deletion commands as DigitalOcean's API timeouts are stricter than AWS.
• Snapshot Maker no longer waits for a snapshot to be finished and just uses the last snapshot as they are near instantaneous on DigitalOcean volumes.
• Alternate cloud provider functionality was removed as we are currently supporting web resources in AWS and Kubernetes and artifacts on DigitalOcean.
• Artifact metadata is pushed to DigitalOcean Spaces instead of AWS S3.
• Jekyll build output was quieted as it fills the logs with non-useful information when troubleshooting. When Jekyll fails another message before or after is more helpful anyways.
• Cloud provider credential switching logic was changed to default to Digital Ocean and aws if provided.

This branch is currently deployed and running via https://github.com/oxheadalpha/xtz-shots-infra

[nicolasochem]

I didn't test the code but I scrolled through. There is commented out code but I understand we may want to keep it for the record.

This branch has been deployed on xtz-shots for ~1 month and seems to be consistently producing artifacts on digitalocean. We should merge & release it. Thanks.