Azure CLI credentials not passed through to container

• VSCode Version: 1.62.3
• Local OS Version: macOS 20.6.0
• Remote OS Version: mcr.microsoft.com/vscode/devcontainers/python:0-3.9-buster
• Remote Extension/Connection Type: Docker
• Logs: /

Steps to Reproduce:

1. Run az account show in a local terminal:

az account show
{
  "environmentName": "AzureCloud",
  "homeTenantId": "...",
  "id": "...",
  "isDefault": true,
  "managedByTenants": [
    {
      "tenantId": "..."
    }
  ],
  "name": "...",
  "state": "Enabled",
  "tenantId": "...",
  "user": {
    "name": "...",
    "type": "user"
  }
}

2. I have the following in my devcontainer.json:

	"features": {
		"git": "os-provided",
		"azure-cli": "latest"
	},

3. Run az account show in a terminal inside the container

vscode ➜ ~ $ az account show
Please run 'az login' to setup account.

To make sure it is not related to my environment, I created a completely new project based on the same container and had the same issue.

Does this issue occur when you try this locally?: No
Does this issue occur when you try this locally and all extensions are disabled?: No

Start with the devcontainer.json features configuration and the azure-cli feature, then reproduce the behavior with az account show on the host and inside the Docker container. Trace how credentials are expected to be passed into the container; done means the same account is available inside without running az login.