Enable k8s otel metrics remapping to elastic metrics

[lahsivjar]

The PR enables k8s metrics remapping.

Similar to https://github.com/elastic/apm-data/pull/277

Related issues

• https://github.com/elastic/opentelemetry-dev/issues/217
• https://github.com/elastic/opentelemetry-dev/issues/180

[carsonip]

Testing

:heavy_check_mark: test-plan-ok

Inventory view k8s pod looks good.

k8s pod metrics page looks good.