Typo in "runs-on" results in indefinitely waiting for a runner to pick up workflow

[PrinsFrank]

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Bug

Body

Describe the bug
When the value for 'runs-on' contains a typo, the workflow indefinitely stays in the "waiting to be picked up" state.

To Reproduce
Steps to reproduce the behavior:

1. Create a workflow that contains a typo in the runs-on key. For example:

jobs:
  test:
    name: Test
    runs-on: ubuntu-lates #Note the lack of a 't' here
    steps:
      - run: echo 'foo'

Expected behavior
Either of two options:

• The workflow doesn't run at all and errors with the 'invalid workflow file' error
• The job doesn't run and errors with a "invalid runner" error or similar

Runner Version and Platform

Github hosted. (ubuntu-latst including the typo)

What's not working?

The workflow is trying to be started when it shouldn't

Job Log Output

Requested labels: ubuntu-latst
Job defined at: PrinsFrank/standards/.github/workflows/ci.yml@refs/heads/main
Waiting for a runner to pick up this job...

Runner and Worker's Diagnostic Logs

N/A, bug happens before the job is started.

Initially posted on actions/runner#3081

[anuragjain-git]

GitHub Actions doesn't immediately fail the workflow when there's an invalid runner specified. Maybe it puts the workflow into a "waiting for a runner" state. It waits until a runner is requested for the job.