chore: release v2.0.0

[seemk]

For a list of major changes and features in 2.0.0 see the notes for 2.0.0-rc1.

Additional changes in this release:

• Upgrade to OpenTelemetry JS 1.8.0 / 0.34.0. #612
• Remove @opentelemetry/instrumentation-aws-lambda from the bundled packages as there exists a separate lambda instrumentation and due to the package not being compatible with @opentelemetry/instrumentation@0.34.0. #612.
• @opentelemetry/api is now a peer dependency and the required version has been bumped to 1.3.0.
• OTEL_LOG_LEVEL now also sets up the logging pipeline, thus diagnostic logging can now be enabled just by enabling it
  via the environment variable. The supported log level values are none, verbose, debug, info, warn, error.
  The logging pipeline can additionally be enabled by setting logLevel configuration option. #605.
• process.command, process.command_line and process.runtime.description resource attributes have been removed from the automatic process detection. #613
• OTEL_TRACES_EXPORTER now only supports otlp, console or both (e.g. OTEL_TRACES_EXPORTER=otlp,console).
  #599
• Add support for OTEL_EXPORTER_OTLP_PROTOCOL, OTEL_EXPORTER_OTLP_TRACES_PROTOCOL, OTEL_EXPORTER_OTLP_METRICS_PROTOCOL. The supported values are grpc (the default) or http/protobuf. #599 #614