[Feature request]: Extract sample rate for all tracing backends.

[subomi]

Is your feature request related to a problem? Please describe.

Currently, it is impossible to configure the trace sample rate for any other tracing backend aside from otel.

Describe the solution you'd like

We should modify the configuration from

  "tracer": {
    "type": "otel", 
    "otel": {
      "sample_rate": 1.0,
      "collector_url": ""
    }

to

  "tracer": {
    "type": "otel",
    "sample_rate": 1.0
    "otel": {
      "collector_url": ""
    }

[linear]

CON-528 [Feature request]: Extract sample rate for all tracing backends.