[bug] Migrate uses of set-output

[ianlewis]

We need to migrate the use of set-output commands and use environment files.

https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

[ianlewis]

We also need to upgrade some actions which use the save-state command. This message was emitted by actions/checkout.

Warning: The `save-state` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/