Dynamic Modules Emit Metrics From Config Context

Added support for emitting metrics (counters, gauges, and histograms) from the config context in dynamic modules, enabling metrics to be recorded from background tasks scheduled outside the request, connection, datagram, or log lifecycle. Supported for the HTTP filter (C++, Go, and Rust SDKs), the network and listener filters (Go and Rust SDKs), and the UDP listener filter and access logger (Rust SDK).