1.5.0-alpha.1 of all core components

OpenTelemetry

• Added Exemplar support. See exemplars for instructions to enable exemplars.

• Added AddDetector factory overload on ResourceBuilder. (#4261)

OpenTelemetry.Api

OpenTelemetry.Api.ProviderBuilderExtensions

OpenTelemetry.Exporter.Console

OpenTelemetry.Exporter.InMemory

OpenTelemetry.Exporter.Jaeger

OpenTelemetry.Exporter.OpenTelemetryProtocol

• Bumped the version of Google.Protobuf used by the project to 3.22.0 so
  that a new performance feature can be used instead of reflection. Removed the
  dependency on System.Reflection.Emit.Lightweight.
  (#4201)

OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs

OpenTelemetry.Exporter.Prometheus.AspNetCore

OpenTelemetry.Exporter.Prometheus.HttpListener

OpenTelemetry.Exporter.Zipkin

OpenTelemetry.Extensions.Hosting

OpenTelemetry.Extensions.Propagators