Preloading @opentelemetry/sdk-node via command-line (node -r)

[habmic]

Hi all,
Nodejs can preload modules via command-line (https://nodejs.org/api/cli.html#cli_r_require_module)
I think it can be beneficial to provide a way to load otel that way, I'm guessing @opentelemetry/sdk-node is the best candidate for that.

It can help people get started without any code changes which is pretty cool.

It does mean the exporter and instrumentation should be loaded via environment variables

WDYT?

[dlmutart]

yes, and I'd also like to see examples of configuring the endpoints via command line if using the auto instrumentation but we are running the collector somewhere other than localhost and default port instead of doing it programmatically.