[Test Automation] Add schedule job as accepted job for PRs and cron jobs

[ConnorHack]

What does this PR do?

Updates CI/CD testing to the schedule workflow job for PRs, manual dispatch, and cron jobs.

• PRs previously would not update the Workflow summary page with the test summary. They would only update the test summary on the PR itself as a comment. This fixes it so the test-summary is displayed as a PR comment AND GHA summary.
• Cron jobs were scheduled, but did not include any tests. This fixes that.
• Manual dispatch step variants have been updated to include 'schedule' jobs.

Test Plan

• Manual Dispatch Run (GPU)
• PR Test Run (CPU)

[ashwinb]

can you comment what these substrings mean? why "fork"?

[ConnorHack]

Our self-hosted runners are initially set up using Cloud Terraform code. Each runner has distinct attributes, including:

• A generic label for the runner
• A specific repository URL

When testing from a fork, a separate runner is required to run independently of the main runner. This is because the forked repository URL differs from the main repository URL, and each runner can only point to one repository.

I adjusted this line so it automatically determines what name to use based on if the repository owner is meta-llama. If it is, then we use the default runner for the main repository. If not, then we use the runner that targets the fork.

[ashwinb]

lg

[ConnorHack]

@ashwinb anything else needed to ship this?