feat: added @opentelemetry/resource-detector-instana to cart service #402
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This PR adds the newly added Instana Otel resource detector to the cart codebase.
The resource detection processor can be used to detect resource information from the host.
In Opentelemetry there is the concept of a resource, see [Resource SDK](https://opentelemetry.io/docs/reference/specification/resource/sdk/). There are process resources, environment resources and custom resources. All will be merged into one resource object, which is attached to every trace object.
The goal for Instana is to use this component as a detector for our Instana agent and attach the real PID and the agent uuid to the custom resource. This will correlate the Otel service spans with the Otel process.