Merge branch '1.8.x' into 1.9.x

# Conflicts:
#	benchmarks/benchmarks-core/gradle.lockfile
#	implementations/micrometer-registry-appoptics/gradle.lockfile
#	implementations/micrometer-registry-atlas/gradle.lockfile
#	implementations/micrometer-registry-azure-monitor/gradle.lockfile
#	implementations/micrometer-registry-cloudwatch/gradle.lockfile
#	implementations/micrometer-registry-cloudwatch2/gradle.lockfile
#	implementations/micrometer-registry-datadog/gradle.lockfile
#	implementations/micrometer-registry-dynatrace/gradle.lockfile
#	implementations/micrometer-registry-elastic/gradle.lockfile
#	implementations/micrometer-registry-ganglia/gradle.lockfile
#	implementations/micrometer-registry-graphite/gradle.lockfile
#	implementations/micrometer-registry-health/gradle.lockfile
#	implementations/micrometer-registry-humio/gradle.lockfile
#	implementations/micrometer-registry-influx/gradle.lockfile
#	implementations/micrometer-registry-jmx/gradle.lockfile
#	implementations/micrometer-registry-kairos/gradle.lockfile
#	implementations/micrometer-registry-new-relic/gradle.lockfile
#	implementations/micrometer-registry-opentsdb/gradle.lockfile
#	implementations/micrometer-registry-otlp/gradle.lockfile
#	implementations/micrometer-registry-prometheus/gradle.lockfile
#	implementations/micrometer-registry-signalfx/gradle.lockfile
#	implementations/micrometer-registry-stackdriver/gradle.lockfile
#	implementations/micrometer-registry-statsd/gradle.lockfile
#	implementations/micrometer-registry-wavefront/gradle.lockfile
#	micrometer-core/gradle.lockfile
#	micrometer-test/gradle.lockfile
#	samples/micrometer-samples-boot2-reactive/gradle.lockfile
#	samples/micrometer-samples-boot2/gradle.lockfile
#	samples/micrometer-samples-core/gradle.lockfile
#	samples/micrometer-samples-hazelcast/gradle.lockfile
#	samples/micrometer-samples-hazelcast3/gradle.lockfile
#	samples/micrometer-samples-javalin/gradle.lockfile
#	samples/micrometer-samples-jersey3/gradle.lockfile
#	samples/micrometer-samples-spring-integration/gradle.lockfile