Plumb context.Context through resource.Environment

[tbpg]

resource.Environment uses context.Background instead of plumbing a context.Context through.

opentelemetry-go/sdk/resource/resource.go

Lines 262 to 269 in 6ce1429

	func Environment() *Resource {
	detector := &fromEnv{}
	resource, err := detector.Detect(context.Background())
	if err != nil {
	otel.Handle(err)
	}
	return resource
	}

[dmathieu]

We can't change that method definition though, as the package is stable. We could possibly have a EnvironmentWithContext method.