Add file configuration types for Tracer, Meter, and Logger#3920

UMMAN2005 wants to merge 2 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-cpp:mainfrom

UMMAN2005:feature/file-config-tracer-meter-loggerUMMAN2005/opentelemetry-cpp:feature/file-config-tracer-meter-loggerCopy head branch name to clipboard