Add missing Prometheus exporter documentation (#4485)

Overwrite logging.config.fileConfig and logging.config.dictConfig to ensure the OTLP LogHandler remains attached to the root logger. Fix a bug that can cause a deadlock to occur over logging._lock in some cases (#4636).

otlp-http-exporter: set default value for param timeout_sec in _export method (#4691)

Update OTLP gRPC/HTTP exporters: calling shutdown will now interrupt exporters that are sleeping before a retry attempt, and cause them to return failure immediately. Update BatchSpan/LogRecordProcessors: shutdown will now complete after 30 seconds of trying to finish exporting any buffered telemetry, instead of continuing to export until all telemetry was exported. (#4638).