Add dynamic updateable consistent threshold sampler

[jackshirazi]

Component(s)

consistent-sampling

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

static ratio sampling is too restrictive, I need dynamic updateable ratio

Describe the solution you'd like

I already have the solution working in https://github.com/jackshirazi/elastic-otel-java/tree/dynamic-sampling , it's basically an additional sampler. But it's cleaner to refactor the existing samplers to make it a subclass

Describe alternatives you've considered

No response

Additional context

I'll refactor and add the class in multiple steps since that makes the PRs easier to review unless one big PR is really preferred