Add VerifySetup Eval Tests and Tool Mocks

[JennyPng]

closes #13132

• test that verify setup gets invoked
• ^ added toolmocks for generate and build code because I wanted to test that verify_setup would be called before those in all repos, but they kept failing so i didn't end up including them because it may be too flaky for now 😸
• revised pipeline name in the README coz i think it was out of date?

[Copilot]

Pull request overview

This PR adds evaluation tests for the VerifySetup functionality and introduces tool mocks for SDK generation and building operations. The changes test that the verify_setup tool is correctly invoked both directly and as a prerequisite step before SDK generation.

• Added two new tool mocks: PackageGenerateCode and PackageBuildCode to support testing SDK generation workflows
• Created test to verify that the verify_setup tool is invoked when explicitly requested
• Created test to verify that verify_setup is called before SDK generation operations

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tools/azsdk-cli/Azure.Sdk.Tools.Cli.Evaluations/ToolMocks/ToolMocks.cs	Registered PackageGenerateCode and PackageBuildCode tool mocks in the mock registry
tools/azsdk-cli/Azure.Sdk.Tools.Cli.Evaluations/ToolMocks/PackageGenerateCode.cs	Implemented tool mock for the azsdk_package_generate_code operation with sample responses
tools/azsdk-cli/Azure.Sdk.Tools.Cli.Evaluations/ToolMocks/PackageBuildCode.cs	Implemented tool mock for the azsdk_package_build_code operation with sample responses
tools/azsdk-cli/Azure.Sdk.Tools.Cli.Evaluations/Scenarios/General/Evaluate_VerifySetup.cs	Added test case to verify that verify_setup tool is invoked for DotNet setup verification
tools/azsdk-cli/Azure.Sdk.Tools.Cli.Evaluations/Scenarios/AzureRestApiSpecs/Evaluate_GenerateSdk.cs	Added test case to verify that verify_setup is invoked before SDK generation