Requirement

In this issue, we want to refactor the configurations for the adaptive sampling processor to ensure that the configuration is laid out logically (part of #5229)

Tasks / outcomes

• All config fields are tagged with mapstructure such that they can be addressable from YAML via "good" names
• Configs implement Validate()
• Configs via YAML support the same defaults as in jaeger-v1
• Configs reuse standard elements of OTEL configs whenever possible, e.g. TLS, clientcfg, etc.
• Configuration looks "logical" and properly grouped, not flattened with long weird names
• We create a migration guide document with a table that lists v1 CLI flags and the corresponding v2 config fields