Moving LogRecord implementation to SDK #4809

Job	Run time
cargo-deny	26s
coverage	3m 19s
docs	1m 29s
external-types (opentelemetry)	1m 2s
msrv	3m 10s
external-types (opentelemetry-sdk)	1m 12s
lint	3m 49s
non-default-examples (opentelemetry-otlp/examples/basic-otlp)	53s
external-types (opentelemetry-otlp)	1m 21s
external-types (opentelemetry-zipkin)	1m 11s
test (stable)	6m 42s
test (beta)	6m 32s
	31m 6s

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