Example and tests for otel collector exporter is not updated still uses `serviceName`

The opentelemetry collector exporter is not updated. In examples and tests, It still uses serviceName for config and looking at the codebase it does not expose that anymore.

I wonder how these got in if we use typescript

https://github.com/open-telemetry/opentelemetry-js/blob/a3b77387012a5f53c193efdefcbf5f6272876e4d/packages/opentelemetry-exporter-collector/test/node/CollectorTraceExporter.test.ts#L61

https://github.com/open-telemetry/opentelemetry-js/blob/a3b77387012a5f53c193efdefcbf5f6272876e4d/examples/collector-exporter-node/tracing.js#L15

I am also unsure what should be the practice now? Should this be how we configure serviceName now? https://github.com/open-telemetry/opentelemetry-js/issues/2271

[mustafain117]

@dyladan Can you please assign this to me CC: @alolita

[delaneyj]

In the updated example just a heads up

import { ResourceAttributes } from '@opentelemetry/semantic-conventions'
import { Resource } from '@opentelemetry/resources'

both libraries also are still on 0.20.0