declarative configuration: span stacktrace enhancements

[SylvainJuge]

span stacktrace is part of contrib and already supports declarative configuration, however there are a few things that we should probably change before we provide declarative configuration support for it:

• the filter is only used for inferred spans, we should probably hide this implementation detail and make inferred-spans and span-stacktrace extensions work well together as they both are part of contrib and should be able to share a few implementation details.

[SylvainJuge]

Upstream PR to filter inferred spans automatically : open-telemetry/opentelemetry-java-contrib#2803

[SylvainJuge]

next steps:

• wait for contrib 1.57.0 to be released (currently blocking this issue)
• update base declarative configuration added in provide experimental base declarative config support #1089

[SylvainJuge]

update edot to filter inferred spans on tracer name rather than is_inferred span attribute implemented in #1097