tracer: make 'jaeger' the default, deprecate 'opentracing' option
requested to merge 08-16-tracer_make_jaeger_the_default_option_for_now_deprecate_misleading_opentracing_option into main
Created by: bobheadxi
See inline docstrings. This will also simplify things a bit when we cut over to otelcollector-by-default
Test plan
n/a