Timer API does not support Kotlin suspend function (coroutines)

Please describe the feature request.

For standard (non suspend functions) it is possible to use record function to measure method invocation time:

Timer.builder("method.timed")
            .register(meterRegistry)
            .record { fn() } // fn() is a standard, non suspend function

However, it is not possible to call a suspend function from within record block:

Timer.builder("method.timed")
            .register(meterRegistry)
            .record { suspendFn() } // Suspension functions can be called only within coroutine body

The support for suspend functions should be added to the library.

Rationale Suspend functions are popular for non-blocking API, and it is currently not possible to measure time needed to call suspend functions without having a custom function to record the time.

Additional context Maybe this could be added as a extension function to the Timer interface.