[Issue] remove hyperlink for agent endpoint gnerated after hosted agent deployment. Add redirect link to foundry documentation on agent invocation

[tinaem]

redirect to this page: https://learn.microsoft.com/en-us/azure/ai-foundry/agents/concepts/hosted-agents?view=foundry#invoke-hosted-agents

[rajeshkamal5050]

Context: users were trying to open link in browser and reporting, instead if we can suggest/point users on what it takes to invoke deployed agents using the doc link above.

{"error":{"code":"401","message":"Access denied due to invalid subscription key or wrong API endpoint. Make sure to provide a valid key for an active subscription and use a correct regional API endpoint for your resource."}}

@trangevi

[leestott]

After azd up

Users are presented with the following

• Agent playground (portal): https://ai.azure.com/nextgen/r/*****
• Agent endpoint: https://ai-account-ej6e74oo7minm.services.********

If user clicks on agent endpoint they get the error 401.

However clicking on the Agent Playground they get the error when trying to interact with Agent also