Fix agent host client tool defaults

[benibenj]

This updates the agent host client tool defaults so tools that now run server-side in the agent host are no longer exposed as client-provided tools.

Summary:

• Remove feedback/comment tools from the default chat.agentHost.clientTools allowlist.
• Add an Agents Window-specific default that excludes problems and runTests, which are not available there.
• Keep task and browser client tools available where applicable.

Validation:

• npm run compile-check-ts-native

[Copilot]

Pull request overview

This pull request adjusts the default allowlist for chat.agentHost.clientTools so that tools that have moved to server-side execution in the agent host are no longer exposed as client-provided tools, and it adds an Agents Window-specific default that omits tools unavailable in that surface.

Changes:

• Refactors the chat.agentHost.clientTools default into shared constants and removes the feedback/comment tools from the default allowlist.
• Adds an agentsWindow configuration default that excludes problems and runTests while keeping task and browser client tools.

Show a summary per file

File	Description
src/vs/workbench/contrib/chat/browser/chat.shared.contribution.ts	Updates the chat.agentHost.clientTools configuration defaults and introduces an Agents Window-specific default list.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 0