RHAIENG-1978: add live CI tests for Bedrock

[ktdreyer]

We want to periodically test Bedrock "live" rather than only testing against recorded responses.

This will probably involve:

1. Re-using the OIDC pattern we used in sdg_hub, with role-to-assume in aws-actions/configure-aws-credentials
2. Generating a short-lived token (docs), probably with the aws-bedrock-token-generator tool
3. Passing that through to the LLS tests like LLAMA_STACK_TEST_INFERENCE_MODE=live, (docs)

[nathan-weinberg]

Could you make a clone of this for Vertex as well @ktdreyer? cc @kami619 @Artemon-line

[nathan-weinberg]

Nvm I see that you have! thank you!

[github-actions]

This issue has been automatically marked as stale because it has not had activity within 60 days. It will be automatically closed if no further activity occurs within 30 days.

[ktdreyer]

unstale