feat: upgrade ray -> 2.7

[troyyyang]

Summary

was testing #713 which upgrades to 2.5. for some reason the head node was constantly restarting. i pulled the branch in my fork and bumped it to 2.7 and tested in an aws cluster. head node is stable, and ran some cursory tests that all worked.

Test Plan

tested on aws cluster

Checklist

• [x] No images hosted from dockerhub
• [ ] Are dashboards present to understand the health of the application. There must be at least 1 of these
  • [ ] all databases should have dashboards
  • [ ] ideally also have at least cpu/mem utilization dashboards for webserver tier of the app
  • [ ] you can use plural from-grafana to convert a grafana dashboard found via google to our CRD
• [ ] Are scaling runbooks present
  • [ ] all databases must have scaling runbooks
  • [ ] you can use the charts in pluralsh/module-library to accelerate this
• [ ] do you need to add config overlays?
  • [ ] inputing secrets
  • [ ] configuring autoscaling
• [ ] If there’s a web-facing component to the app, we need to support OIDC authentication and setting up private networks if no authentication option is viable
• [ ] All major clouds must be supported
  • [ ] Azure
  • [x] AWS
  • [ ] GCP

[troyyyang]

Potential issues after more stringent testing

resolved

[michaeljguarino]

hey @troyyyang is there a reason this is still a draft PR? Let us know when it's ready to test on our end and we can get it merged.

[troyyyang]

hey @troyyyang is there a reason this is still a draft PR? Let us know when it's ready to test on our end and we can get it merged.

let me know what i should do with the appversion, but otherwise all set

[plural-bot]

:tada: This PR is included in version 1.2.0 :tada:

The release is available on GitHub release

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