Support declarative config for contrib extensions #14088
Description
- Declarative config: support inferred spans opentelemetry-java-contrib#2011
- declarative config: support gcp auth extension opentelemetry-java-contrib#2012
- declarative config: span stacktrace opentelemetry-java-contrib#2028
- declarative config: baggage processor opentelemetry-java-contrib#2013
- Declarative config: Cloud component providers opentelemetry-java-contrib#2014