Remove template IDs from MCP tool call metadata (#33467)

## What changed

- Remove `template_id` from MCP tool call items and lifecycle events.
- Remove `templateId` from app-server `McpToolCallAppContext` responses and generated schemas.
- Update protocol conversions, documentation, and existing test expectations for the revised metadata shape.

GitOrigin-RevId: f2b1304eadff661eec3966673ea71206b1542b98

codex-rs/app-server-protocol/src/protocol/v2/item.rs

@@ -398,7 +398,6 @@ pub struct McpToolCallAppContext {
     pub link_id: Option<String>,
     pub resource_uri: Option<String>,
     pub app_name: Option<String>,
-    pub template_id: Option<String>,
     pub action_name: Option<String>,
 }
 
@@ -950,7 +949,6 @@ impl From<CoreTurnItem> for ThreadItem {
                         link_id: mcp.link_id,
                         resource_uri: mcp.mcp_app_resource_uri.clone(),
                         app_name: mcp.app_name,
-                        template_id: mcp.template_id,
                         action_name: mcp.action_name,
                     }),
                     mcp_app_resource_uri: mcp.mcp_app_resource_uri,