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Output from azd version
Run azd version and copy and paste the output here:
Built from latest main branch, commit: 3c31aab

Describe the bug
In Foundry Toolkit extension, role assignment is automatically done in deployment stage. azd is expected to do it in provision stage.
Without the role assignment, deployment will fail as follows:

To Reproduce

• azd ai agent init -m foundry-samples-pr/samples/python/hosted-agents/bring-your-own/activity/echo/agent.manifest.yaml at…
• azd provision
• azd deploy

Expected behavior
Deployment should be successful without manual assignment of role.

Environment
Information on your environment:
* Language name and version
* IDE and version : [e.g. Visual Studio 16.3]

Additional context
Add any other context about the problem here.