Enable MCP server for tempo

It would be really useful to enable and expose the embedded MCP server in tempo as part of the default configuration. https://grafana.com/docs/tempo/latest/api_docs/mcp-server/#configuration Currently I run LGTM locally during development to read logs/traces, and having the MCP server enabled would enable my AI assistant to take advantage of this extra information when debugging. Right now I have to rely on codex using the bash tool to run `docker compose logs <service>`, but this does not expose as much useful information as raw traces.