OTLP exporter: encode instrumentation scope schema url and attributes to otlp proto#4359

xrmx merged 14 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-python:mainfrom

dbarker:fix_instrumentation_scope_encoding_to_otlpdbarker/opentelemetry-python:fix_instrumentation_scope_encoding_to_otlpCopy head branch name to clipboard