Configure Lettuce with MicrometerTracing instead of MicrometerCommandLatencyRecorder when micrometer-tracing is available

[mp911de]

Conditionally on Micrometer Tracing classpath availability, it would make sense to configure MicrometerTracing for the Lettuce driver instead of MicrometerCommandLatencyRecorder.

MicrometerTracing uses the broader Observability API and can deliver spans and metrics whereas MicrometerCommandLatencyRecorder records only timers.

[wilkinsona]

@mp911de would we lose anything if we always configured MicrometerTracing when ObservationRegistry is on the classpath and never bothered with MicrometerCommandLatencyRecorder?