[Tool] Update tests, no bicep needed (ARM)

### 🔧 Tool Name

update-tests

### 📄 What Should This Tool Do?

From a generated tests, make sure we can update thenm to be runnable.

This sub-issue assume there is no need for a bicep file. This mostly the ARM SDK testing.

### 📥 Inputs and 📤 Outputs

TBD

### 🏗️ Execution Context

Both MCP and CLI

### 💻 CLI Command and Flags (if applicable)

_No response_

Start by locating the update-tests tool and its generated-test handling for ARM SDK scenarios across MCP and CLI. Clarify the expected inputs and outputs, then verify that generated tests can be updated into runnable tests without a Bicep file.

Written by the indexing model from the issue text.