[CICD] github workflow to push nightly package to testpypi

[yanxi0830]

What does this PR do?

• Set up github workflow to push nightly package to testpypi

How it works / Test Plan

1. Get the version for release package based on how push happens.

2. Trigger workflow in llama-stack-client & llama-models to build a package using the version:

   • llama-stack workflow: https://github.com/meta-llama/llama-stack/actions/runs/12702425574
   • llama-stack-client workflow: https://github.com/meta-llama/llama-stack-client-python/actions/runs/12702427674
   • llama-models workflow: https://github.com/meta-llama/llama-models/actions/runs/12702427746

3. Wait for the workflows to finish.

4. After client and models package workflow finishes is pushed, update llama-stack package version & requirements. Then push a package for llama-stack.

4. Simple tests on published package

Verify the updated package

pip install --index-url https://pypi.org/simple/ --extra-index-url https://test.pypi.org/simple/ llama-stack==0.0.64.dev20250110

llama stack build --template fireworks --image-type conda
llama stack run fireworks

Sources

Please link relevant resources if necessary.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Ran pre-commit to handle lint / formatting issues.
• Read the contributor guideline,
  Pull Request section?
• Updated relevant documentation.
• Wrote necessary unit or integration tests.

[yanxi0830]

cc @sixianyi0721 we can add a step to trigger integration test flow here using the built package

[ashwinb]

this case happens when you run the workflow adhoc by pressing a button from the UI, for example?

[yanxi0830]

No, this case only happens with testing (e.g. on push). If you press the button, you will need to enter the version:

[yanxi0830]

might be able to replace with this action: https://github.com/marketplace/actions/trigger-workflow-and-wait , but keeping it raw and explicit for now.

[ashwinb]

@yanxi0830 yeah I read about some stuff; sounds good to me

[ashwinb]

is the number "5" recommended? curious.

[yanxi0830]

Could probably add a while loop here as well to wait for workflow to be created, like this action (e.g. https://github.com/convictional/trigger-workflow-and-wait/blob/f69fa9eedd3c62a599220f4d5745230e237904be/entrypoint.sh#L137-L142)