Refactor run-tests-command.yml

[cnunciato]

This is a very large file that has a ton of duplication and is much harder to understand than it needs to be. We should clean it up and remove what we can to make it more maintainable.

[cnunciato]

There's a bunch of additional cleanup we could do on the workflows in this repo:

• Fix and refactor the long-failing https://github.com/pulumi/examples/actions/workflows/cron.yml (probably as we did with pulumi/templates, where we now use one workflow and trigger it on multiple events)
• Delete the smoke-test-* workflows, as no one seems to be using them
• Fix up the workflow naming to align with pulumi/templates