Make Tracing Options More Configurable

[renaz6]

Based on a comment from Wes on #100

if we split apart the choices a bit more we can let the user decide what they want without us needing to do much & we can expand/grow later.

Replace sampleLocalTraces with:

sampling-strategy:
   parent-initiated: ignore # [ignore (default), honor]
   no-parent: never         # [never (default), always, traceidratio, ...]
   traceidratio:            # For each sampler that needs inputs they get enumerated separately.
       percentage: 15.5

Choosing the quietest mode (completely off) as defaults.

Until we need to add traceidratio we can just know it goes here. I think @Sachin4403 may want:

  sampling-strategy:
    parent-initiated: honor
    no-parent: always

We'll probably want to use:

  sampling-strategy:
    parent-initiated: honor
    no-parent: never

We can add the traceidratio later if someone wants/needs it.