[GitHub Actions] - Adding Monitor Self-hosted Runners Workflow

[dannymartinm]

DO NOT MERGE until the infrastructure is in place.

As part of the issue 21106, @elink21 and I have implemented the self-hosted runners for the Ubuntu and Windows operating systems.

Please see the Approved Pull Request (PR#22703) for reference.

In this PR you will find the following changes:

• Adding Monitor Self-hosted Runners to runs-on GitHub-hosted runners. This workflow monitors if the Beam self-hosted runners are up and healthy.

PR#16511 : Previous PR for reference.
BEAM-12812: Original Jira may contain additional context.

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[elink21]

This additional workflow doesn't run on Self-hosted Runners but is preferable to wait until the self-hosted Runners are up and running for merging to avoid false outage alerts.

[github-actions]

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[damccorm]

Just one small comment remaining, other than that this looks good to me!

[github-actions]

Reminder, please take a look at this pr: @damccorm

[elink21]

Status update: reviewed by @damccorm, waiting for the migration window to deploy the infrastructure and request the merge.

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@beam.apache.org list. Thank you for your contributions.

[github-actions]

This pull request has been closed due to lack of activity. If you think that is incorrect, or the pull request requires review, you can revive the PR at any time.

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@beam.apache.org list. Thank you for your contributions.