Telemetry configuration review

[brunobat]

Because of these issues on the OpenTelemetry side, the final form of how OPenTelemetry file configurations and merge semantics are being discusses here:
open-telemetry/opentelemetry-specification#3850
open-telemetry/opentelemetry-specification#3752

Once it is settled how to programatically configure the OTel Java SDK after the file configuration is added we need to revisit what was merged as part of #148.

[Emily-Jiang]

It seems that file based config is experiment. Let's leave it for now. I suggest to move to the Next Milestone.

[brunobat]

We should not use the file configuration proposed by OpenTelemetry.
All MP Telemetry implementations already have their own configuration sub-systems. There is little value on supporting this.