[opentelemetry/upstream] OpenTelemetry Operator API Module

[rrhubenov]

Upstream OpenTelemetry operator defines CRDs in an api package.
However, this package has dependency on controller-runtime which causes conflicts with the g/g repo.

Plan is for the api package to be extracted into an api module or repo and the unnecessary dependencies to be removed from it.

For more context can read open-telemetry/opentelemetry-operator#4362
PRs:

• Move config parsing and CRD metrics from apis to internal package open-telemetry/opentelemetry-operator#4989
• Move apis package to a sub-module open-telemetry/opentelemetry-operator#5077