[Tracer|Meter|Logger]Configurator and [Tracer|Meter|Logger]Config to be optional

[pellared]

Specify that [Tracer|Meter|Logger]Configurator and [Tracer|Meter|Logger]Config MAY be implemented by the SDK (they are not required).

The Go SIG does not want to implement these features.

We want to implement the declarative configuration using via processors.

We are fine with the proposal given we want to implement this configuration using (internally) LogRecordProcessors. We do not want to add LoggerConfigurator into the Go Logs SDK, because we find it unnecessary as everything should be achievable using LogRecordProcessor. The experience for the end-user should remain the same.

Note that we already have:

Enabled is an operation that a LogRecordProcessor MAY implement

for languages that do not want to support Logger.Enabled via processors.

The same should be done for [Tracer|Meter|Logger]Configurator and [Tracer|Meter|Logger]Config.

CC @open-telemetry/go-maintainers

Originally posted by @pellared in #4612 (comment)