Deprecation warnings on GHAction - test harness runner

[swcurran]

I noted these deprecation errors on the “test harness runner” that is used to periodically (every 2 days, currently) to run the AATH runsets.

Get Test Harnesses
Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16: the-coding-turtle/ga-file-list@v0.4.1. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.
Get Test Harnesses
The set-output 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/
Get Test Harnesses
The set-output 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/