Add option to programmatically customization declarative config components, add supplementary guidance#4777

jack-berg wants to merge 8 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-specification:mainfrom

jack-berg:declarative-config-programmmatic-customizationjack-berg/opentelemetry-specification:declarative-config-programmmatic-customizationCopy head branch name to clipboard