Prepare for v0.27.0 - update Metrics API and Log(bridge) API to RC, Metrics SDK & OTLP Exporter to Beta. #7176

Job	Run time
external-types (opentelemetry)	54s
external-types (opentelemetry-sdk)	1m 4s
external-types (opentelemetry-otlp)	1m 13s
external-types (opentelemetry-zipkin)	1m 7s
lint	3m 18s
non-default-examples (windows-latest, opentelemetry-otlp/examples/basic-otlp)	2m 7s
test (ubuntu-latest, stable)	3m 21s
non-default-examples (ubuntu-latest, opentelemetry-otlp/examples/basic-otlp)	34s
test (ubuntu-latest, beta)	3m 32s
test (stable, windows-latest)	6m 56s
cargo-deny	22s
coverage	2m 45s
test (stable, macos-latest)	2m 10s
docs	1m 8s
msrv (windows-latest, 1.70.0)	2m 0s
msrv (windows-latest, 1.71.1)	1m 55s
msrv (ubuntu-latest, 1.70.0)	1m 5s
test (stable, actuated-arm64-4cpu-16gb)	1s
msrv (ubuntu-latest, 1.71.1)	51s
	36m 23s

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